Machining, positioning and clamping device and clamping method for tail plate of injection molding machine

Abstract

The invention discloses a machining, positioning and clamping device and method for a tail plate of an injection molding machine. The device comprises a base, a supporting plate and at least one positioning and clamping assembly. The positioning and clamping assembly comprises a positioning connecting plate, a supporting block, a locking block, a locking rod and a positioning mechanism. Preferably, the positioning mechanism is an observation window and a positioning pin which are arranged on the positioning connecting plate, and precise positioning is achieved by matching with positioning holes in the tail plate supporting legs. The observation window facilitates visual monitoring of the positioning state. Through modular design, rapid and accurate positioning and rigid clamping of the tail plate on a machining center are achieved, the problems that a traditional clamping mode is low in efficiency and poor in precision are effectively solved, and the machining quality and the production efficiency are remarkably improved.

Description

Technical Field

[0001] This invention relates to the field of machining tooling technology, and in particular to a positioning and clamping device and method for machining large structural parts of injection molding machines, especially the tail plate of PX machine type, on CNC machine tools (such as machining centers). Background Technology

[0002] The tail plate of an injection molding machine is a key component of the mold clamping mechanism. It is large in size and complex in structure, and usually has multiple non-coplanar mounting feet. When performing precision machining on its hole system, planes, etc., it needs to be stably and accurately clamped on the machine tool.

[0003] Currently, the clamping of such large, irregularly shaped workpieces mostly employs traditional methods: using a combination of clamping plates, bolts, nuts, and various heights of shims and stops on the machine tool table. Operators need to repeatedly adjust the position and height of the shims according to the actual shape of the tailplate and tighten them at multiple points with the clamping plate. This method has several drawbacks: First, positioning accuracy relies entirely on the operator's experience, resulting in poor repeatability and inconsistent machining datums when different workpieces or the same workpiece are clamped twice, affecting product quality. Second, the clamping process is cumbersome and time-consuming, with auxiliary time far exceeding actual cutting time, leading to low production efficiency. Third, due to the weight of the tailplate, relying solely on the clamping plate to press it from the side or top may result in slight displacement or vibration risks during machining under cutting forces, affecting machining accuracy and surface quality. Furthermore, after clamping, the space occupied by the tool itself, with its bottom close to the pallet, prevents the tool from effectively machining holes and end faces, or the limited retraction space causes machining interference.

[0004] Therefore, there is an urgent need in this field for a special tooling that can achieve fast, accurate and reliable clamping of the injection molding machine tail plate to overcome the shortcomings of the existing technology. Summary of the Invention

[0005] The purpose of this invention is to overcome the shortcomings of the prior art and provide a machining positioning and clamping device and method for the tail plate of an injection molding machine. This device aims to achieve rapid, precise positioning and rigid clamping of the tail plate, thereby effectively improving machining accuracy and production efficiency.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A machining positioning and clamping device for the tail plate of an injection molding machine includes a base and a support plate fixed on the base. The support plate is used to support the tail plate to be machined. Crucially, it also includes at least one set of positioning and clamping components. The positioning and clamping components include a positioning connecting plate, a support block, a locking block, a locking rod, and a positioning mechanism. The positioning connecting plate is adapted to be fixedly connected to the bottom surface of the support legs of the tail plate.

[0008] The locking block is pressed against the upper surface of the tail plate's support leg;

[0009] The locking rod is sequentially inserted into the support leg and locking block of the tail plate and fastened to the connecting plate;

[0010] The support block is fixedly mounted on the support plate to support the positioning connecting plate; the positioning mechanism is mounted on the positioning connecting plate to form a precise positioning engagement with the support legs of the tail plate.

[0011] As a preferred embodiment, the positioning mechanism includes an observation window formed on the positioning connecting plate and a positioning pin disposed in the observation window, the positioning pin being used to cooperate with a preset positioning hole on the tail plate support.

[0012] Furthermore, the observation window is a through-slot structure, and its width dimension is larger than the diameter of the positioning pin, so as to facilitate observation of the engagement state between the positioning pin and the tail plate from the side, ensuring that the positioning pin has been correctly inserted into the positioning hole of the tail plate.

[0013] As a preferred embodiment, the support block is connected to the tray with its side having the largest surface area. This vertical installation method provides a larger contact area and better stability, ensuring the rigidity of the support.

[0014] As a preferred embodiment, the positioning connecting plate is provided with a first connecting hole for connecting and fastening the support leg of the tail plate upwards; and a second connecting hole for connecting and fastening the support block downwards.

[0015] As a preferred embodiment, the support block is provided with a third connecting hole for downward connection and fastening to the tray.

[0016] Accordingly, the present invention also provides a method for clamping the tail plate of an injection molding machine using the above-mentioned positioning and clamping device, characterized by comprising the following steps:

[0017] Step 1: Hoist the tailplate onto the pallet so that its outriggers are roughly above the corresponding positioning connecting plate;

[0018] Step 2: Lower the tail plate so that the support legs of the tail plate cooperate with the positioning mechanism on the positioning connecting plate to achieve precise positioning;

[0019] Step 3: Fasteners are used to sequentially pass through the positioning connecting plate and the support block to lock the tail plate, positioning connecting plate and support block into one unit.

[0020] Compared with the prior art, the advantages and beneficial effects of the present invention are as follows:

[0021] 1. Precise positioning and good repeatability: Through the preset positioning mechanism (especially the combination of positioning pin and observation window), a unique and accurate positioning reference is provided for the tail plate, which completely eliminates the error caused by manual adjustment and ensures extremely high repeatability positioning accuracy during batch processing.

[0022] 2. High clamping efficiency: The operation process is simplified, requiring only three main steps: hoisting, lowering and positioning, and tightening bolts, which greatly shortens the clamping auxiliary time and improves the utilization rate of the machine tool.

[0023] 3. Good connection rigidity and stable processing: The tail plate support and support plate are firmly connected into a rigid whole by locking blocks, locking rods, positioning connecting plates and support blocks, which effectively suppresses vibration and deformation during processing and ensures processing accuracy and surface quality.

[0024] 4. Visualized operation and high reliability: The observation window design allows the operator to intuitively confirm the fit between the positioning pin and the workpiece, avoiding damage to the equipment or workpiece caused by forced locking due to inaccurate positioning, thus improving the safety and reliability of operation. Attached Figure Description

[0025] Figure 1 This is a three-dimensional structural schematic diagram of the processing, positioning, and clamping device for the tail plate of an injection molding machine according to the present invention;

[0026] Figure 2 This is a front view schematic diagram of the processing, positioning, and clamping device for the tail plate of an injection molding machine according to the present invention;

[0027] Figure 3 This is a top view of the processing, positioning, and clamping device for the tail plate of an injection molding machine according to the present invention.

[0028] Figure 4 This is a schematic diagram of the three-dimensional structure of the positioning connecting plate of the present invention;

[0029] Figure 5 This is a three-dimensional structural diagram of the support block of the present invention;

[0030] Figure 6 This is a top view of the support block of the present invention.

[0031] Figure 7 This is a bottom view of the support block structure of the present invention;

[0032] Figure 8 This is a three-dimensional structural diagram of the tail plate of the PX model injection molding machine of the present invention when it is fixed by the machining positioning clamping device;

[0033] Figure 9 This is a first-view three-dimensional structural diagram of the tail plate of the PX model injection molding machine of the present invention;

[0034] Figure 10 This is a second-view three-dimensional structural diagram of the tail plate of the PX model injection molding machine of the present invention;

[0035] Figure 11 This is a three-dimensional structural diagram of the locking block of the present invention;

[0036] Figure 12 This is a side view of the locking block of the present invention.

[0037] The diagram shows the following labels: 1. Base; 2. Support plate; 3. Tail plate; 31. Support leg; 32. Preset positioning hole; 33. Locking block; 34. Locking rod; 4. Positioning connecting plate; 41. First connecting hole; 42. Second connecting hole; 5. Support block; 51. Third connecting hole; 6. Positioning observation slot; 7. Positioning pin. Detailed Implementation

[0038] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments. The following embodiments are only used to clearly illustrate the technical solutions of the present invention and should not be construed as limiting the scope of protection of the present invention.

[0039] like Figures 1 to 8 As shown, a preferred embodiment of the present invention provides a machining positioning and clamping device for the tail plate of a PX injection molding machine. The device mainly includes a robust base 1, which is typically welded or cast from steel and has sufficient mass and rigidity to be stably mounted on the machine tool table. A support plate 2 is bolted to the base 1, serving as a large mounting reference surface to support the tail plate 3 to be machined.

[0040] The core of this invention lies in at least one set of positioning and clamping components disposed on the pallet 2. Each set of components corresponds to one support leg 31 of the tail plate 3. In this embodiment, as shown... Figure 8 As shown, the tail plate 3 has two legs 31, and correspondingly two sets of positioning and clamping assemblies are provided.

[0041] Each positioning and clamping assembly includes a positioning connecting plate 4, a support block 5, a locking block 33, a locking rod 34, and a positioning mechanism.

[0042] Support block 5: as shown Figures 5-7 As shown, the support block 5 is a rectangular steel block, vertically (i.e., "side-mounted") fixed from the bottom of the support plate 2 to the top of the support plate 2 via hexagonal socket bolts and a third connecting hole 51 on its largest side face. A second connecting hole 42 is provided on its top surface to connect with the positioning connecting plate 4. This installation method ensures that the support block 5 has optimal anti-overturning capacity and support rigidity. The number of support blocks 5 can be one or more, depending on the size of the support leg 31 and process requirements to prevent machining interference.

[0043] Locking block 33, such as Figure 11, Figure 12 As shown, the support leg 31, which is pressed against the tail plate 3, has a groove on its edge that contacts the support leg, so as to engage with the arc angle connecting the support leg and the tail plate and accurately press the support leg.

[0044] The locking rod 34 is sequentially inserted into the support leg 31 and the locking block 33 of the tail plate 3, and is fastened to the inside of the connecting plate 4.

[0045] Positioning connecting plate 4: such as Figure 4 As shown, a rectangular steel plate is fixed to the top surface of the support block 5 by hexagonal bolts and a second connecting hole 42. The upper surface of the positioning connecting plate 4 is used to contact and support the support legs 31 of the tail plate 3.

[0046] Positioning mechanism: such as Figure 1 As shown, in this embodiment, the mechanism consists of an observation window 6 and a positioning pin 7. The observation window 6 is a rectangular through slot extending through the thickness of the positioning connecting plate 4. The positioning pin 7 (preferably a diamond-shaped pin or a cylindrical pin) is interference-fitted or threaded into a predetermined position within the observation window 6. Figures 8-10 As shown, the axial position of the positioning pin 7 precisely corresponds to the position of a pre-machined positioning hole 32 on the tail plate 3 support leg 31.

[0047] like Figure 4 As shown, a first connecting hole 41 is also machined on the positioning connecting plate 4. This hole is a threaded blind hole or a through hole, used to screw in a bolt to pull the support leg 31 of the tail plate 3 upward.

[0048] The device is used as follows:

[0049] Step 1, pre-alignment: Use a crane to lift the tailgate 3 and move it above the pallet 2 so that each support leg 31 is roughly aligned with the positioning connecting plate 4 below it.

[0050] Step 2, Precise Positioning: Slowly lower the tailplate 3. During this process, the operator can observe the top of the positioning pin 7 through the observation window 6 on the side. As the tailplate 3 continues to descend, the positioning pin 7 will begin to enter the positioning hole 32 on the bottom surface of the outrigger. The engagement process between the positioning pin 7 and the positioning hole 32 can be clearly seen through the observation window 6 until the tailplate 3 is completely seated on the positioning connecting plate 4, indicating that positioning is complete.

[0051] Step 3, Rigid Locking: Use long bolts to pass through the through holes on the support leg 31 (or use stud bolts), the first connecting hole 41 and the second connecting hole 42 on the positioning connecting plate 4, and finally screw them into the threaded hole on the top surface of the support block 5. By tightening these bolts, the tail plate 3, the positioning connecting plate 4 and the support block 5 are tightly connected into a whole, completing the clamping.

[0052] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A processing positioning and clamping device for the tail plate of an injection molding machine, comprising a base (1) and a support plate (2) fixed on the base (1), the support plate (2) being used to support the tail plate (3) to be processed, characterized in that, Also includes: At least one set of positioning and clamping components, the positioning and clamping components comprising: The positioning connecting plate (4) is adapted to be fixedly connected to the bottom surface of the support leg (31) of the tail plate (3); A support block (5) is fixedly mounted on the tray (2) to support the positioning connecting plate (4); The locking block (33) is pressed against the upper surface of the support leg (31) of the tail plate (3); The locking rod (34) is inserted into the support leg (31) and locking block (33) of the tail plate (3) in sequence and is fastened to the connecting plate (4). The positioning connecting plate (4) is provided with a positioning mechanism for forming a precise positioning fit with the support leg (31) of the tail plate (3).

2. The machining positioning and clamping device according to claim 1, characterized in that, The positioning mechanism includes an observation window (6) opened on the positioning connecting plate (4) and a positioning pin (7) disposed in the observation window (6). The positioning pin (7) is used to cooperate with the preset positioning hole on the support leg of the tail plate (3).

3. The machining positioning and clamping device according to claim 2, characterized in that, The observation window (6) is a through-slot structure, and its width dimension is larger than the diameter of the positioning pin (7) so as to facilitate observation of the fit between the positioning pin (7) and the tail plate (3) from the side.

4. The machining positioning and clamping device according to claim 1, characterized in that, The support block (5) is connected to the tray (2) with its side having the largest surface area.

5. The machining positioning and clamping device according to claim 1, characterized in that, The positioning connecting plate (4) is provided with a first connecting hole (41) for connecting and fastening the support leg (31) of the tail plate (3) upward; and a second connecting hole (42) for connecting and fastening the support block (5) downward.

6. The machining positioning and clamping device according to claim 1, characterized in that, The support block (5) is provided with a third connecting hole (51) for downward connection and fastening to the tray (2).

7. A method for clamping the tail plate of an injection molding machine using the positioning and clamping device as described in any one of claims 1-6, characterized in that, Includes the following steps: Step 1: Hoist the tail plate (3) onto the support plate (2) so that its legs are roughly above the corresponding positioning connecting plate (4); Step 2: Lower the tail plate (3) so that the support legs of the tail plate (3) cooperate with the positioning mechanism on the positioning connecting plate (4) to achieve precise positioning; Step 3: Fasteners are used to sequentially pass through the positioning connecting plate (4) and the support block (5) to lock the tail plate (3), positioning connecting plate (4) and support block (5) into one unit.

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