Automobile door sill injection mold

Abstract

The application relates to an automobile door sill injection mold, belonging to the field of automobile part manufacturing, which comprises a lower mold and an upper mold matched with the lower mold, the upper mold and the lower mold are spliced to form a cavity, the cavity is used for forming an automobile door sill, and an adjusting plate is detachably connected to the lower mold and covers part of the cavity forming groove. For the automobile door sill with only slight difference on the surface of the sill body, the adjusting plate can be directly processed by moving, which is beneficial to improving the applicability of the mold.

Description

Technical Field

[0001] This application relates to the field of automotive parts manufacturing, and in particular to an injection mold for automotive door sills. Background Technology

[0002] A car door sill is one or more horizontal beams located inside the car door and at the bottom of the car body. Common materials for car door sills include steel and aluminum alloy, and the shape of the door sill varies depending on the vehicle design and functional requirements.

[0003] A type of car threshold, such as Figure 1 As shown, it includes a sill body 1, on which several positioning protrusions 11 are fixed, and several grooves 12 are provided on the sill body 1, with the grooves 12 being distributed at intervals along the length of the sill body 1.

[0004] In related technologies, car door sills are integrally injection molded using injection molds. However, while processing car door sills of different shapes is possible, the shape of the injection mold is relatively limited. If the number of grooves on the car door sill changes, another injection mold needs to be used for processing. Therefore, the applicability of injection molds needs to be improved. Summary of the Invention

[0005] To improve the adaptability of the mold, this application provides an injection mold for automotive door sills.

[0006] An injection mold for an automobile door sill includes a lower mold and an upper mold that cooperates with the lower mold. The upper mold and the lower mold are joined to form a cavity for molding an automobile door sill. An adjusting plate is detachably connected to the lower mold for covering a portion of the cavity forming a positioning protrusion.

[0007] By adopting the above technical solution, if the shape of each design drawing differs only on the surface of the sill, the disassembly plate can be removed from its original position and then installed in the position corresponding to the design drawing. For sills with only minor differences in shape on the surface of the sill, the adjustment plate can be moved directly for processing, which helps to improve the applicability of the mold.

[0008] Preferably, the lower mold includes a lower base and a lower forming plate slidably connected to the lower base. The forming cavity is formed by splicing the upper mold and the lower forming plate. An elastic element is provided on the lower base, and the elastic element causes the lower forming plate to have a tendency to move away from the lower base.

[0009] By adopting the above technical solution, in actual use, the upper mold and the lower mold are respectively installed on the frame. The upper mold moves closer to the lower forming plate and presses against the lower forming plate to position it. The injection molding liquid is injected into the forming cavity and the product is waited for to be formed. After the product cools down, the upper mold and the lower mold separate, and the upper forming plate is lifted by the action of the elastic element, making it easy for the staff to pick up.

[0010] Preferably, the lower forming plate includes a forming part slidably connected to the lower base and a lifting part slidably connected to the forming part. The elastic element is connected to the forming part. The lifting part is located on the side of the forming cavity away from the upper mold. A fixing groove is provided on the forming part for the lifting part to be engaged. A driving assembly is provided on the lower base, and the driving assembly drives the lifting part to move.

[0011] By adopting the above technical solution, when the workpiece is processed, during the process of the forming part moving and lifting under the action of the elastic element, the driving component drives the lifting part to move and extend out of the fixing groove, and the lifting part abuts against the bottom of the workpiece, so that the workpiece can quickly leave the forming cavity.

[0012] Preferably, the drive assembly includes a connector disposed on the lower base, a top block that is vertically and slidably connected to the molding part, and a guide rod disposed on the molding part. The connector passes through the guide rod and is connected to the top block. The top block is used to abut against the lifting part. The guide rod is located on the side of the top block near the lifting part.

[0013] By adopting the above technical solution, during the lifting process of the forming part, the guide rod moves upward, causing the end of the connector connected to the top block to move towards the ejection direction, thus lifting the lifting part. Since the lifting part is lifted by the movement of the forming part, there is no need for a separate drive source to drive the lifting part, which helps reduce energy consumption.

[0014] Preferably, the lifting part includes a limiting post slidably connected to the forming part and a top plate disposed on the limiting post. The forming part is provided with a sliding groove, the limiting post is attached to the inner wall of the sliding groove, and the limiting post slides into or out of the sliding groove.

[0015] By adopting the above technical solution, the limiting rod abuts against the inner wall of the sliding groove, making it less likely for the top plate to deviate from the moving trajectory during the movement, and making it easier for the top plate to be inserted into the fixed groove.

[0016] Preferably, the lower base is provided with a thermal expansion and contraction component, which is connected to the elastic component, and the elastic component is connected to the lower base through the thermal expansion and contraction component.

[0017] By adopting the above technical solution, in the actual processing, the upper mold presses against the molding part to position the molding part. After the injection liquid is injected into the molding cavity, the temperature of the molding part rises, and the thermally expanding and contracting parts expand due to heat, which reduces the distance between the thermally expanding and contracting parts and the molding part. This helps to alleviate the elastic fatigue of the elastic parts during the molding process. As the temperature of the injection liquid drops, the thermally expanding and contracting parts recover their deformation, making it easier to lift the molding part in time.

[0018] Preferably, the forming part has a positioning groove, the upper mold has a positioning block, the positioning groove is for the positioning block to be inserted into, the positioning block has a slot, the forming part has a sliding block connected to it, the sliding direction of the block is perpendicular to the distribution direction of the positioning groove and the positioning block, the slot is for the positioning block to be inserted into, and the block is connected to the thermal expansion and contraction component.

[0019] By adopting the above technical solution, after the upper mold is pressed against the molding part, the positioning block is inserted into the positioning groove, the injection liquid enters the molding cavity, causing the temperature inside the molding cavity to rise. The expansion of the thermally expanding and contracting parts drives the locking block to move and be locked into the positioning groove, which helps to reduce the situation where the upper mold is separated from the molding part before the temperature inside the molding cavity drops.

[0020] Preferably, the lower base has a mounting groove for the upper forming plate to be inserted into, and the elastic element is located on the side of the upper forming plate away from the bottom of the mounting groove.

[0021] By adopting the above technical solution, the elastic element is set on the side of the upper forming plate away from the bottom of the mounting groove, which makes it easier for the upper forming plate to press against the bottom of the mounting groove during processing, and helps the upper forming plate to remain stable during processing.

[0022] In summary, this application includes at least one of the following technical effects: 1. For car door sills with only minor differences in shape on the surface of the sill, the movable adjustment plate can be used for direct processing, which helps to improve the applicability of the mold; 2. The lifting part is driven by the drive component to move and extend out of the fixed groove. The lifting part abuts against the bottom of the workpiece, which facilitates the quick removal of the workpiece from the forming cavity. 3. When the injection liquid enters the molding cavity, the temperature inside the molding cavity rises. The expansion of the thermally expanding and contracting parts causes the locking block to move and engage with the locking slot for positioning. This helps to reduce the situation where the upper mold separates from the lower mold before the temperature inside the molding cavity drops. Attached Figure Description

[0023] Figure 1 This is a structural diagram of a car door sill.

[0024] Figure 2 This is a schematic diagram of the overall structure of this embodiment.

[0025] Figure 3 This is a partial structural diagram of this embodiment, mainly showing the structure at the lower mold.

[0026] Figure 4 This is a partial cross-sectional view of the lower mold in this embodiment, mainly showing the internal structure of the lower mold.

[0027] Explanation of reference numerals in the attached drawings: 1. Sill; 11. Positioning protrusion; 12. Groove; 2. Lower mold; 21. Lower base; 211. Mounting groove; 2111. Limiting surface; 212. Elastic element; 213. Thermal expansion and contraction element; 2131. Shape memory alloy; 22. Lower forming plate; 221. Forming part; 2211. Limiting protrusion; 2212. Sliding groove; 2213. Fixing groove; 2214. Receiving groove; 2215. Clearance groove; 222. Lifting part; 2221. Limiting post; 2222. Top plate; 2223. Adjusting plate; 223. Positioning groove; 3. Upper mold; 31. Forming cavity; 32. Positioning block; 321. Slot; 4. Drive assembly; 41. Connector; 42. Top block; 43. Guide rod. Detailed Implementation

[0028] The present application will be further described in detail below with reference to the accompanying drawings.

[0029] A type of car door sill, reference Figure 1 It includes a sill body 1, on which several positioning protrusions 11 are fixed, and several grooves 12 are provided on the sill body 1, with the grooves 12 being distributed at intervals along the length of the sill body 1.

[0030] This application discloses an injection mold for an automobile door sill. (Refer to...) Figure 2 and Figure 3 A car door sill injection mold includes a lower mold 2 and an upper mold 3. The upper mold 3 is located above the lower mold 2. The lower mold 2 and the upper mold 3 are joined together to form a molding cavity 31. Molding liquid is injected into the molding cavity 31, and after cooling, a car door sill of the corresponding shape is obtained.

[0031] Reference Figure 3 and Figure 4 The lower mold 2 includes a lower base 21 and a lower forming plate 22. The lower forming plate 22 is located above the lower base 21 and is slidably connected to the lower base 21. The upper end face of the lower base 21 has an installation groove 211 for the lower forming plate 22 to be inserted into. The lower forming plate 22 slides into or out of the installation groove 211. A limiting protrusion 2211 is formed on the lower forming plate 22. The limiting protrusion 2211 is located on one side of the lower forming plate 22 perpendicular to the sliding direction of the lower forming plate 22. A limiting surface 2111 is formed on the inner wall of the installation groove 211. The limiting surface 2111 is located above the installation groove 211 and on the sliding path of the limiting protrusion. The limiting surface 2111 is used to abut against the side of the limiting protrusion 2211 near the opening of the installation groove 211, which helps to prevent the lower forming plate 22 from moving away from the lower base 21.

[0032] Reference Figure 4A plurality of elastic elements 212 are fixed on the lower base 21. All elastic elements 212 are located within the mounting groove 211. The elastic elements 212 are located on the side of the lower forming plate 22 away from the inner wall of the mounting groove 211. The elastic elements 212 pull the lower forming plate 22 taut, giving it the drive to move away from the inner wall of the mounting groove 211. When the mold is not processed, the lower forming plate 22 is spaced apart from the bottom of the mounting groove 211, with the upper end of the lower forming plate 22 protruding from the lower base 21.

[0033] Reference Figure 4 Several thermal expansion and contraction components 213 are fixed on the lower base 21. The thermal expansion and contraction components 213 are memory alloys 2131. The position and number of memory alloys 2131 correspond one-to-one with the position and number of elastic components 212. The memory alloys 2131 are located on the side of the corresponding elastic component 212 away from the bottom of the mounting groove 211. The opposite ends of the elastic component 212 are fixedly connected to the memory alloys 2131 and the lower forming plate 22, respectively. The elastic component 212 is fixedly connected to the lower base 21 through the corresponding memory alloys 2131.

[0034] During actual processing, as the upper mold 3 moves closer to the lower mold 2, the upper mold 3 presses against the lower forming plate 22, causing the lower forming plate 22 to move towards the bottom of the mounting groove 211. The elastic element 212 pulls the lower forming plate 22 tight, which helps to buffer the lower forming plate 22 and reduces the collision between the upper mold 3 and the lower forming plate 22.

[0035] After the upper mold 3 and the lower molding plate 22 are joined to form the molding cavity 31, injection molding liquid is injected into the molding cavity 31. The temperature inside the molding cavity 31 rises, causing the temperature in the mounting groove 211 to rise as well. The shape memory alloy 2131 expands and deforms, and the distance between the shape memory alloy 2131 and the lower molding plate 22 gradually decreases. This helps reduce elastic fatigue of the elastic component 212 during the injection molding process and improves the service life of the elastic component 212. In this embodiment, the elastic component 212 is a spring.

[0036] Reference Figure 3 and Figure 4 The lower base 21 has a positioning groove 223 at one end near the upper mold 3. The upper mold 3 has a positioning block 32 fixed at one end near the lower molding plate 22. The positioning groove 223 allows the positioning block 32 to be engaged and positioned. The positioning block 32 has a slot 321, and the extension direction of the slot 321 is perpendicular to the moving direction of the positioning block 32. The shape memory alloy 2131 has a locking block fixed at one end near the positioning groove 223. The locking block is slidably connected to the lower molding plate 22. The shape memory alloy 2131 expands and deforms when heated, causing the locking block to be engaged in the slot 321, positioning the upper mold 3 and the lower base 21. This helps to reduce the situation where the upper mold 3 accidentally detaches from the lower mold 2 before the injection liquid in the mold cools down.

[0037] Reference Figure 1 and Figure 4The lower forming plate 22 includes a forming part 221 and a lifting part 222, and an elastic element 212 is connected to the forming part 221. The lifting part 222 includes a limiting post 2221 and a top plate 2222. The forming part 221 slides and rises on the lower base 21. The upper mold 3 is spliced ​​with the forming part 221 to form a cavity 31. The forming part 221 has a sliding groove 2212 and a fixing groove 2213. The fixing groove 2213 is located above the sliding groove 2212 and communicates with the sliding groove 2212. The fixing groove 2213 communicates with the forming cavity 31. 3 is located below the molding cavity 31. The fixing groove 2213 is used for the top plate 2222 to be inserted and positioned. The limiting post 2221 is located below the top plate 2222 and is fixedly connected to the top plate 2222. The sliding groove 2212 is used for the limiting post 2221 to be inserted. The limiting post 2221 slides into or out of the sliding groove 2212. The driving component 4 is installed on the lower base 21. The driving component 4 abuts against the top plate 2222 and drives the top plate 2222 to move.

[0038] Reference Figure 4 Several adjusting plates 2223 are detachably connected to the top plate 2222. The adjusting plates 2223 are used to cover the forming positioning protrusions 11 of the composite cavity 31. The adjusting plates 2223 are detachably connected to the lifting part 222 by screws. In actual use, the number of positioning protrusions 11 at the sill 1 can be adjusted according to the shape of the drawing, so that the mold can form more diverse shapes, which is beneficial to improving applicability. In other embodiments, the adjusting plates 2223 can also be detachably connected to the top plate 2222 by means of buckles, magnetic blocks, etc.

[0039] Reference Figure 4The drive assembly 4 includes a connector 41, a top block 42, and a guide rod 43. A receiving groove 2214 is provided on the molding part 221. The receiving groove 2214 is located below the fixed groove 2213 and communicates with the fixed groove 2213. The guide rod 43 is located inside the receiving groove 2214. The top block 42 is slidably connected to the molding part 221 and is located below the top plate 2222. The top block 42 slides into or out of the receiving groove 2214. The inner wall of the receiving groove 2214 abuts against the top block 42 to limit the position of the top block 42. The end of the top block 42 near the top plate 2222 abuts against the top plate 2222. The lifting and lowering of the top block 42 drives the lifting and lowering of the top plate 2222. The guide rod 43 is fixed on the molding part 221. The guide rod 43 is located above the connection between the connector 41 and the top block 42. The two ends of the connector 41 are fixedly connected to the top block 42 and the lower base 21, respectively. The molding part 221 is provided with a relief groove 2215, which communicates with the receiving groove 2214. The connector 41 passes through the relief groove 2215 and is fixedly connected to the top block 42. The connection between the connector 41 and the lower base 21 is located below the connection between the connector 41 and the guide rod 43. The connector 41 bypasses the guide rod 43 and is fixedly connected to the top block 42. The upper ends of the connector 41 and the guide rod 43 abut against the connecting rope in this embodiment.

[0040] When the upper mold 3 and the forming part 221 are joined together to form the forming cavity 31, the top plate 2222 is inserted into the fixing groove 2213.

[0041] During actual use of the mold, the upper mold 3 abuts against the forming part 221, causing the forming part 221 to move the guide rod 43 downward, increasing the length of the connecting piece 41 on the side of the guide rod 43 near the top block 42, making it easier for the top block 42 to descend under gravity, and for the top plate 2222 to be inserted into the fixing groove 2213. After injection molding is completed, wait for the forming part 221 to cool, and the shape memory alloy 2131 cools and shrinks, causing the locking block to disengage from the locking groove 321, releasing the positioning of the upper mold 3. As the upper mold 3 moves away from the forming part 221, the elastic element 212 pulls the forming part 221 to move away from the bottom of the mounting groove 211, reducing the length of the connecting piece 41 on the side of the guide rod 43 near the top block 42, causing the top block 42 to move upward and eject the workpiece processed in the forming cavity 31, making demolding convenient.

[0042] The implementation principle of an automotive door sill injection mold according to this application embodiment is as follows: In the actual processing, the position of the adjustment plate 2223 in the molding cavity 31 can be adjusted according to the design drawings, so that automotive door sills with different surface shapes of the door sill 1 can be injection molded, which is beneficial to improving the applicability of the mold.

[0043] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A car door sill injection mold for molding a car door sill, the car door sill including a door sill body (1), a plurality of positioning protrusions (11) fixed on the door sill body (1), and a plurality of grooves (12) provided on the door sill body (1), the plurality of grooves (12) being spaced apart along the length direction of the door sill body (1), characterized in that: The mold includes a lower mold (2) and an upper mold (3) that cooperates with the lower mold (2). The upper mold (3) and the lower mold (2) are spliced ​​together to form a molding cavity (31). The molding cavity (31) is used to form a car door sill. An adjusting plate (2223) is detachably connected to the lower mold (2). The adjusting plate (2223) is used to cover the part of the molding cavity (31) that forms the positioning protrusion (11). The lower mold (2) includes a lower base (21) and a lower forming plate (22) slidably connected to the lower base (21). The forming cavity (31) is formed by splicing the upper mold (3) and the lower forming plate (22). An elastic element (212) is provided on the lower base (21). The elastic element (212) causes the lower forming plate (22) to have a tendency to move away from the lower base (21). The lower forming plate (22) includes a forming part (221) slidably connected to the lower base (21) and a lifting part (222) slidably connected to the forming part (221). The elastic element (212) is connected to the forming part (221). The lifting part (222) is located on the side of the forming cavity (31) away from the upper mold (3). A fixing groove (2213) is provided on the forming part (221) for the lifting part (222) to be inserted. A driving assembly (4) is provided on the lower base (21) for the lifting part (222) to move. The drive assembly (4) includes a connector (41) disposed on the lower base (21), a top block (42) that is vertically and slidably connected to the molding part (221), and a guide rod (43) disposed on the molding part (221). The connector (41) passes through the guide rod (43) and is connected to the top block (42). The top block (42) is used to abut against the lifting part (222). The guide rod (43) is located on the side of the connection between the connector (41) and the top block (42) close to the lifting part (222).

2. The automotive door sill injection mold according to claim 1, characterized in that: The lifting part (222) includes a limiting post (2221) slidably connected to the forming part (221) and a top plate (2222) provided on the limiting post (2221). The forming part (221) is provided with a sliding groove (2212). The limiting post (2221) fits against the inner wall of the sliding groove (2212). The limiting post (2221) slides into or out of the sliding groove (2212).

3. The automotive door sill injection mold according to claim 1, characterized in that: The lower base (21) is provided with a thermal expansion and contraction component (213), which is connected to the elastic component (212). The elastic component (212) is connected to the molding part (221) through the thermal expansion and contraction component (213).

4. The automotive door sill injection mold according to claim 3, characterized in that: The lower base (21) is provided with a positioning groove (223), and the upper mold (3) is provided with a positioning block (32). The positioning groove (223) is for the positioning block (32) to be inserted into. The positioning block (32) is provided with a slot (321). A slot is slidably connected to the forming part (221). The sliding direction of the slot is perpendicular to the distribution direction of the positioning groove (223) and the positioning block (32). The slot (321) is for the positioning block (32) to be inserted into. The slot is connected to the thermal expansion and contraction part (213).

5. The automotive door sill injection mold according to claim 1, characterized in that: The lower base (21) is provided with an installation groove (211) for the lower forming plate (22) to be inserted into. The elastic element (212) is located on the side of the lower forming plate (22) away from the bottom of the installation groove (211).

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