Injection mold for an energy-absorbing device

Abstract

The utility model discloses an injection mold of energy absorption device, include: lower mould subassembly, it includes lower mould base, sliding block and pressure lever, the lower mould base has with the installation groove of pulling off the block profile matching, be equipped with the locating post in the installation groove to with the fixed hole limit on pulling off the block, the sliding block swing installation on lower mould base, and the pressure lever is fixed in the sliding block inboard, upper mould subassembly, it includes upper mould base and wedge tight block, when upper mould subassembly and lower mould subassembly close mould, the wedge tight block press down the sliding block and make it move towards inboard, and then drive the pressure lever and resist the mounting panel of tightly. The utility model provides an injection mold of energy absorption device, realizes mounting panel stable clamping through wedge tight block and sliding block cooperation, spares cylinder clamping, simplifies the procedure, promotes the forming speed, and guarantees injection molding pin precision and whole energy absorption device performance through locating post and pulling off the block fixed hole cooperation.

Description

Technical Field

[0001] This utility model relates to the field of injection mold technology, and more specifically, to an injection mold for an energy-absorbing device. Background Technology

[0002] In automotive cushioning and energy absorption devices, a common structure typically consists of a mounting plate and a pull-out block, connected by several injection-molded pins. These pins are generally injection-molded, directly integrally formed with the mounting plate and pull-out block to avoid wobbling and noise caused by gaps. When a vehicle collides and crumples, the mounting plate and pull-out block move relative to each other. During this process, the injection-molded pins are sheared by shear force, separating the pull-out block from the mounting plate and achieving the desired energy absorption effect.

[0003] However, in existing manufacturing processes, the molding of injection pins often requires the assistance of external clamping mechanisms. For example, a cylinder is used to assist in clamping the part before the injection molding operation. While this method ensures that the injection pin is molded in the predetermined position, it has certain drawbacks: Firstly, clamping and positioning are required before injection molding, which is a complex process; Secondly, the movement speed driven by cylinders is relatively slow, which affects the overall molding efficiency; Third, the cylinder clamping structure occupies space, increases the complexity of the production process, and is not conducive to improving the production cycle. Summary of the Invention

[0004] In view of the problems existing in the background technology, such as the need for cylinder clamping in injection molding of pins, complex process, slow operation speed and limited production cycle, the purpose of this utility model is to provide an injection mold for an energy absorption device, so as to achieve the technical effect of compact structure, simple operation and high molding efficiency.

[0005] The technical solution adopted by this utility model is: to provide an injection mold for an energy absorption device, comprising: The lower die assembly includes a lower die base, a slider, and a pressure rod. The lower die base has a mounting groove that matches the contour of the pull-out block. A positioning post is provided in the mounting groove to limit the movement with a fixing hole on the pull-out block. The slider is movably mounted on the lower die base, and the pressure rod is fixed inside the slider. The upper mold assembly includes an upper mold base and a wedge block. When the upper mold assembly and the lower mold assembly are closed, the wedge block presses down on the slider to move it inward, thereby driving the pressure rod to press against the mounting plate.

[0006] By employing the above solution, the lower mold assembly and the upper mold assembly, through the cooperation of wedge blocks and sliders, can achieve stable clamping of the mounting plate during injection molding, eliminating the need for an additional cylinder clamping mechanism. This simplifies the process, increases operating speed, and improves production cycle time. Simultaneously, the cooperation between the positioning pin and the pull-out block fixing hole ensures molding accuracy, improves the fit between the injection pin and the mounting plate and pull-out block, and thus enhances the overall performance of the energy absorption device.

[0007] According to one embodiment of this utility model, the injection mold further includes a base, a hydraulic cylinder, and a guide rail. Both the hydraulic cylinder and the guide rail are mounted on the base. The guide rail supports the lower mold base, and the moving end of the hydraulic cylinder is connected to the lower mold base to drive the lower mold base to reciprocate along the guide rail. This configuration enables smooth switching of the lower mold base between injection molding stations.

[0008] According to one embodiment of the present invention, a slider seat is fixedly installed on the lower mold base, and the slider is elastically installed on the slider seat.

[0009] According to one embodiment of this utility model, a first spring is provided between the slider and the slider seat. This structure utilizes the spring to provide a return force, enabling the slider to automatically reset during demolding, reducing manual adjustment and improving the automation level of the mold.

[0010] According to one embodiment of the present invention, the lower mold base is provided with a connecting rod and a push rod. The middle part of the connecting rod is rotatably connected to the bottom of the lower mold assembly, one end is hinged to the push rod, and the other end is a free end. The push rod is vertically arranged at the bottom of the mounting plate. When the free end of the connecting rod is pressed, the push rod pushes the mounting plate upward.

[0011] According to one embodiment of this utility model, a pad is provided at the end of the ejector rod away from the connecting rod, and the pad is located on the surface of the lower mold base. By setting the pad, the force-bearing area of ​​the ejector rod can be increased, local indentations on the mounting plate can be reduced, and the service life of the mold and parts can be extended.

[0012] According to one embodiment of this utility model, a second spring is provided between the ejector rod and the lower mold base. This design provides an automatic restoring force for the ejector rod, ensuring that the ejector rod quickly returns to its original position after use.

[0013] According to one embodiment of the present invention, the mounting plate is provided with two pull-out blocks, and the lower mold base has a first position and a second position corresponding to the two pull-out blocks. Each position is provided with a mounting groove and a slider, and the hydraulic cylinder drives the lower mold base to switch between the positions.

[0014] According to one embodiment of the present invention, when the lower mold base is in the first position, the wedge block presses against the slider in the first position, and the upper mold base injection molds the injection pin onto the pull-out block in that position.

[0015] According to one embodiment of the present invention, when the lower mold base is in the second position, the wedge block presses against the slider in the second position, and the upper mold base injection molds the injection pin onto the pull-out block in that position. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a perspective view of the energy-absorbing device in an embodiment of this utility model.

[0018] Figure 2 This is a perspective view of the injection mold in the embodiment of this utility model.

[0019] Figure 3 This is a schematic diagram of the injection mold in an embodiment of the present invention.

[0020] Figure 4 This is a top view of the lower mold assembly in an embodiment of the present invention.

[0021] Figure 5 for Figure 4 A cross-sectional view along line AA in the middle.

[0022] Figure 6 for Figure 4 A cross-sectional view along the BB line.

[0023] Figure 7 This is a schematic diagram of the lower mold assembly in an embodiment of the present invention.

[0024] Figure 8 This is a schematic diagram of the slider seat and slider in an embodiment of this utility model.

[0025] Figure 9 This is a schematic diagram of the connection of the top rod in an embodiment of this utility model.

[0026] Figure 10 This is a perspective view of the upper mold assembly in an embodiment of this utility model.

[0027] Explanation of the labels in the diagram: 10. Energy absorption device; 20. Lower mold assembly; 30. Upper mold assembly; 11. Mounting plate; 12. Pull-out block; 13. Injection pin; 13a. Fixing hole; 21. Base; 22. Hydraulic cylinder; 23. Guide rail; 24. Lower mold base; 25. Slider base; 26. Slider; 27. Pressure rod; 28. Pedal; 29. ​​Ejector rod; 210. First spring; 24a. Mounting slot; 24b. Positioning post; 29a, pad; 29b, second spring; 31. Upper mold base; 32. Wedge block. Detailed Implementation

[0028] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model. Example 1

[0029] like Figure 1 As shown in the figure, a perspective view of the energy-absorbing device 10 is presented. The energy-absorbing device 10 includes a mounting plate 11, with pull-out blocks 12 disposed on both sides of the mounting plate 11. The pull-out blocks 12 are laterally engaged and inserted into the notches of the mounting plate 11. Four holes are provided at corresponding positions on the mounting plate 11 and the pull-out blocks 12. When the pull-out blocks 12 move along the mounting plate 11 to a predetermined position, their holes align with the holes on the mounting plate 11, thereby forming a cavity for injection molding the injection pins 13. To improve molding efficiency, the injection mold of this invention has a first position and a second position on the lower mold base 24, and arranges the cavities in a one-out-two manner. That is, after the upper mold assembly 30 and the lower mold assembly 20 are closed, two cavities are formed for simultaneously injection molding the injection pins 13 on the pull-out blocks 12 of two energy-absorbing devices 10. After the injection molding at the first position is completed, the lower mold base 24 switches to the second position to realize the injection molding of the pull-out block 12 and the pin 13 at the second position, thereby completing the alternating injection molding of the two sets of pull-out blocks 12.

[0030] Combination Figure 2-10 As shown, the injection mold in this embodiment includes a lower mold assembly 20 and an upper mold assembly 30. The lower mold assembly 20 includes a lower mold base 24, a slider 26, and a pressure rod 27. The lower mold base 24 is provided with a mounting groove 24a that matches the contour of the pull-out block 12. A positioning post 24b is provided in the mounting groove 24a. The positioning post 24b can be inserted into the fixing hole 13a on the pull-out block 12 to achieve limiting, thereby ensuring that the position of the pull-out block 12 is accurate and stable during the injection molding process. The slider 26 is movably mounted on the lower mold base 24 and can move in a predetermined direction. The pressure rod 27 is fixed on the inner side of the slider 26. When the slider 26 moves under the drive of force, the pressure rod 27 is driven to press against the mounting plate 11, thereby ensuring a stable fit between the mounting plate 11 and the pull-out block 12 during the injection molding process.

[0031] Furthermore, combined Figure 10 As shown, the upper mold assembly 30 includes an upper mold base 31 and a wedge block 32. When the upper mold assembly 30 and the lower mold assembly 20 are closed, the wedge block 32 presses the slider 26 downward, causing it to move towards the inside of the lower mold base 24, thereby driving the pressure rod 27 to press against the mounting plate 11, thus achieving reliable positioning of the mounting plate 11 and the pull-out block 12.

[0032] Specifically, in combination Figure 2-3 As shown, the injection mold also includes a base 21, a hydraulic cylinder 22, and a guide rail 23. Both the hydraulic cylinder 22 and the guide rail 23 are mounted on the base 21. The guide rail 23 supports and guides the movement of the lower mold base 24. The moving end of the hydraulic cylinder 22 is connected to the lower mold base 24, enabling the lower mold base 24 to reciprocate along the guide rail 23, thereby switching the lower mold base 24 between different injection molding positions. Furthermore, two pull-out blocks 12 are provided on the mounting plate 11. The lower mold base 24 has a first position and a second position corresponding to the two pull-out blocks 12, each position having a mounting groove 24a and a slider 26. The hydraulic cylinder 22 can drive the lower mold base 24 to switch between the first and second positions, thereby achieving alternating injection molding of the two pull-out blocks 12.

[0033] Furthermore, when the lower mold base 24 is in the first position, the wedge block 32 presses the slider 26 in the first position, so that the pressure rod 27 on the inner side of the slider 26 presses against the mounting plate 11, ensuring the positioning of the mounting plate 11 and the pull-out block 12. The upper mold base 31 performs injection molding on the pull-out block 12 in this position to obtain an accurate injection pin 13.

[0034] Furthermore, when the lower mold base 24 is in the second position, the wedge block 32 presses against the slider 26 in the second position, causing the pressure rod 27 to also press against the mounting plate 11. The upper mold base 31 completes the molding of the injection pin 13 of the other pull-out block 12 in this position, thereby realizing continuous injection molding at two stations, effectively improving the production cycle and mold utilization rate. Furthermore, combined Figure 8 As shown, a slider seat 25 is fixedly installed on the lower mold base 24. The slider 26 is installed on the slider seat 25 through an elastic structure, enabling it to elastically displace under external force and automatically reset after the external force is released. This design ensures that the slider 26 can be stably clamped under the action of the wedge block 32, and can also quickly reset when the mold is opened, facilitating the smooth demolding of the pull-out block 12 and the molded part.

[0035] Furthermore, a first spring 210 is provided between the slider 26 and the slider seat 25. The first spring 210 is compressed when the wedge block 32 presses the slider 26, and provides a restoring force after the pressure is released, ensuring that the slider 26 can automatically return to its initial position. This structure not only improves the movement flexibility of the slider 26, but also avoids injection molding deviations caused by abnormal slider 26 position.

[0036] Furthermore, combined Figure 9 As shown, the lower mold base 24 is provided with a connecting rod 28 and a push rod 29. The middle part of the connecting rod 28 is rotatably mounted on the bottom of the lower mold assembly 20. One end of the connecting rod 28 is hinged to the push rod 29, and the other end is set as a free end. The push rod 29 is vertically arranged at the bottom of the mounting plate 11. When the operator presses down on the free end of the connecting rod 28, the connecting rod 28 rotates and drives the push rod 29 to move upward, thereby lifting the mounting plate 11, which facilitates the removal of the pull-out block 12 and its molded parts.

[0037] Furthermore, a pad 29a is provided at the end of the ejector rod 29 away from the connecting rod 28. The pad 29a is located on the surface of the lower mold base 24 and plays a buffering and supporting role during the process of the ejector rod 29 pushing the mounting plate 11, so as to avoid the ejector rod 29 directly acting on the lower mold base 24 and causing wear.

[0038] Furthermore, a second spring 29b is provided between the ejector pin 29 and the lower mold base 24. The second spring 29b is compressed when the ejector pin 29 moves upward, and releases its elasticity after the external force is removed, so that the ejector pin 29 can return to its original position automatically, thereby avoiding affecting the injection operation of the next cycle.

[0039] In this embodiment, the steps for using the injection mold are as follows: Step 1: Before injection molding begins, the mounting plate 11 and the pull-out block 12 are pre-assembled. The pull-out block 12 engages with the notch on the mounting plate 11 through its shape, and the fixing hole 13a on the pull-out block 12 is substantially aligned with the corresponding hole on the mounting plate 11. Then, the above components are placed together in the mounting groove 24a of the lower mold base 24, and the positioning pin 24b is inserted into the fixing hole 13a of the pull-out block 12, thereby completing the limiting and preliminary positioning of the pull-out block 12.

[0040] Step 2: The lower mold base 24 is moved along the guide rail 23 by the hydraulic cylinder 22, so that the lower mold base 24 is accurately moved to the first position. At this time, the slider 26 and the pressure rod 27 at the first position are aligned with the mounting plate 11, ready to enter the mold closing stage.

[0041] Step 3: The upper mold assembly 30 moves downward and closes with the lower mold assembly 20. As the wedge block 32 presses down, the slider 26 is pushed inward, causing the pressure rod 27 to press against the mounting plate 11, thereby firmly pressing the mounting plate 11 and the pull-out block 12 together, ensuring that they remain stable during the molding process and do not shift.

[0042] Step 4: With the mold fully closed and the positioning reliable, the injection molding machine injects molten plastic into the cavity, filling the cavity formed by the corresponding holes of the mounting plate 11 and the pull-out block 12. After cooling and solidification, the injection pin 13 is obtained, realizing the fixed connection between the pull-out block 12 and the mounting plate 11.

[0043] Step 5: After injection molding is completed and cooled, the upper mold assembly 30 moves upward, releasing the pressure on the slider 26. Under the action of the first spring 210, the slider 26 automatically resets. At this time, the operator can press the free end of the connecting rod 28 to push the ejector rod 29 onto the mounting plate 11, thereby facilitating the release block 12 and the molded part to be removed from the lower mold base 24.

[0044] Step 6: After completing the injection at the first position, the hydraulic cylinder 22 actuates again, driving the lower mold base 24 to move along the guide rail 23 to the second position. At this time, the slider 26 and pressure rod 27 at the second position correspond to the mounting plate 11, and the next round of injection operation begins.

[0045] Step 7: Repeat the steps of mold closing, clamping, injection molding, mold opening, and part removal to form the injection pin 13 of another pull-out block 12 in the second position. By alternating between the first and second positions, the mold can continuously complete the molding of multiple pull-out blocks 12 in the same injection molding machine, significantly improving production cycle time and molding efficiency.

[0046] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model 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. Therefore, they should not be construed as limitations on this utility model.

[0047] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0048] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0049] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. An injection mold for an energy-absorbing device, characterized in that, include: The lower die assembly includes a lower die base, a slider, and a pressure rod. The lower die base has a mounting groove that matches the contour of the pull-out block. A positioning post is provided in the mounting groove to limit the pull-out block to a fixing hole. The slider is movably mounted on the lower die base, and the pressure rod is fixed inside the slider. The upper mold assembly includes an upper mold base and a wedge block. When the upper mold assembly and the lower mold assembly are closed, the wedge block presses down on the slider to move it inward, thereby driving the pressure rod to press against the mounting plate.

2. The injection mold for an energy-absorbing device according to claim 1, characterized in that: The device includes a base, a hydraulic cylinder, and a guide rail. The hydraulic cylinder and the guide rail are both mounted on the base. The guide rail supports the lower mold base. The moving end of the hydraulic cylinder is connected to the lower mold base to drive the lower mold base to reciprocate along the guide rail.

3. The injection mold for an energy-absorbing device according to claim 2, characterized in that: A slider seat is fixedly installed on the lower mold base, and the slider is elastically mounted on the slider seat.

4. The injection mold for an energy-absorbing device according to claim 3, characterized in that: A first spring is provided between the slider and the slider seat.

5. The injection mold for an energy-absorbing device according to claim 1, characterized in that: The lower mold base is provided with a connecting rod and a push rod. The middle part of the connecting rod is rotatably connected to the bottom of the lower mold assembly. One end of the connecting rod is hinged to the push rod, and the other end is a free end. The push rod is vertically set at the bottom of the mounting plate. When a pressing force is applied to the free end of the connecting rod, the push rod is driven to move upward to lift the mounting plate.

6. The injection mold for an energy-absorbing device according to claim 5, characterized in that: The end of the push rod away from the connecting rod is provided with a pad, and the pad is located on the surface of the lower mold base.

7. The injection mold for an energy-absorbing device according to claim 5, characterized in that: A second spring is provided between the push rod and the lower mold base.

8. The injection mold for an energy-absorbing device according to claim 2, characterized in that: The mounting plate is provided with two pull-out blocks. The lower mold base has a first position and a second position corresponding to the two pull-out blocks. Each position is provided with a mounting groove and a slider. The hydraulic cylinder can drive the lower mold base to switch between the positions.

9. The injection mold for an energy-absorbing device according to claim 8, characterized in that: When the lower mold base is in the first position, the wedge block presses against the slider set in the first position, and the upper mold base injection molds the pull-out block into an injection pin in the first position.

10. The injection mold for an energy-absorbing device according to claim 8, characterized in that: When the lower mold base is in the second position, the wedge block presses against the slider located in the second position, and the upper mold base injection molds the pull-out block into an injection pin in the second position.

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