Precise injection molding connecting device for automobile plastic parts

Abstract

This utility model discloses a precision injection molding connection device for automotive plastic parts, including a base plate, a lower mold, and an upper mold. The upper mold is located above the lower mold, and the lower mold is fixed to the upper outer surface of the base plate. Guide sleeves are installed at the four corners of the upper outer surface of the lower mold, and guide posts are fixedly installed at the four corners of the lower outer surface of the upper mold. Insertion structures are fixedly installed on the outer surfaces of both ends of the upper mold, each insertion structure including a first fixing block and an insertion block. Hydraulic wedge locks are fixedly installed on the outer surfaces of both ends of the lower mold. This precision injection molding connection device for automotive plastic parts, through the hydraulic wedge locks and insertion structures, hydraulically locks the mold after the lower and upper molds are closed, improving the tightness of the mold after closing, increasing the locking force, and improving the precision of injection molding. The guide sleeves and guide posts ensure a clearance ≤0.005mm, further improving the accuracy of mold closing.

Description

Technical Field

[0001] This utility model relates to the field of automotive plastic injection molding technology, specifically to a precision injection molding connection device for automotive plastic parts. Background Technology

[0002] Precision injection molding of automotive plastic parts requires extremely high mold closing accuracy and clamping force. Especially under the trend of automotive lightweighting, the injection molding process of high-precision, high-strength plastic structural parts (such as connecting brackets, interior clips, etc.) must ensure that there are no gaps between the molds after mold closing, in order to avoid problems such as flash, dimensional deviation or uneven material filling.

[0003] Traditional injection molds typically use mechanical clamping mechanisms (such as toggle clamping). Mechanical clamping relies on the rigidity of the mechanism, and after long-term use, wear can easily lead to a decrease in clamping force.

[0004] Therefore, we propose a precision injection molding connection device for automotive plastic parts. Utility Model Content

[0005] (a) Technical problems to be solved

[0006] In view of the shortcomings of the prior art, this utility model provides a precision injection molding connection device for automotive plastic parts, which improves the tightness of the lower mold and the upper mold after mold closing, increases the clamping force, and improves the precision of injection molding, thus effectively solving the problems in the background art.

[0007] (II) Technical Solution

[0008] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a precision injection molding connection device for automotive plastic parts, comprising a base plate, a lower mold, and an upper mold. The upper mold is located above the lower mold, and the lower mold is fixed to the upper outer surface of the base plate. Guide sleeves are installed at the four corners of the upper outer surface of the lower mold, and guide posts are fixedly installed at the four corners of the lower outer surface of the upper mold. Insertion structures are fixedly installed on the outer surfaces of both ends of the upper mold. The insertion structure includes a first fixing block and an insertion block. Hydraulic wedge locks are fixedly installed on the outer surfaces of both ends of the lower mold. The hydraulic wedge lock includes a second fixing block, an insertion groove, a protective cover, a hydraulic rod, a sliding hole, an extension guide sleeve, a moving block, a lower inclined wedge block, and a pressure sensor. A wedge lock groove is opened at the bottom of the front outer surface of the insertion block.

[0009] Preferably, the clearance between the outer wall of the guide post and the guide sleeve is ≤0.005mm.

[0010] Preferably, the first fixing block is fixed to the outer surfaces of both ends of the upper mold, the plug-in block is fixed to the lower outer surface of the first fixing block, the second fixing block is fixed to the outer surfaces of both ends of the lower mold, the protective cover is fixed to the bottom of the outer surface of the front end of the second fixing block, the hydraulic rod is fixed inside the protective cover at one end away from the second fixing block, and the moving block is fixed at the middle of the outer surface of one end of the piston rod in the hydraulic rod and the outer surface of one end of the lower inclined wedge block.

[0011] Preferably, the sliding hole is opened at the bottom of the outer surface of the front end of the second fixed block, the extended guide sleeve is fixed at the front end of the sliding hole, and the extended guide sleeve is located in the protective cover. The outer wall of the moving block and the lower inclined wedge block is slidably connected to the extended guide sleeve and the sliding hole.

[0012] Preferably, the insertion slot is formed on the upper outer surface of the second fixing block, and the pressure sensor is fixed at the bottom of the insertion slot.

[0013] Preferably, the outer wall of the plug-in block and the plug-in groove are plugged in, and the outer wall of the lower inclined wedge block and the wedge locking groove are plugged in.

[0014] (III) Beneficial Effects

[0015] Compared with the prior art, this utility model provides a precision injection molding connection device for automotive plastic parts, which has the following advantages:

[0016] 1. This is a precision injection molding connection device for automotive plastic parts. The hydraulic wedge lock is hydraulically driven, and the clamping force can be dynamically adjusted to adapt to the process requirements of different injection molding materials. At the same time, the contact pressure at the bottom of the insertion groove is monitored in real time by a pressure sensor to ensure the clamping force and avoid overload or insufficient clamping.

[0017] 2. This precision injection molding connection device for automotive plastic parts improves the mold closing and alignment accuracy of the upper and lower molds through the precise fit of the guide pillars and guide sleeves (gap ≤ 0.005mm), ensuring the dimensional stability of the injection molding. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of the precision injection molding connection device for automotive plastic parts after the lower mold and upper mold are closed.

[0019] Figure 2 This is a schematic diagram of the structure of a precision injection molding connection device for automotive plastic parts after the lower mold and upper mold are separated.

[0020] Figure 3 This is a side cross-sectional view of the hydraulic wedge lock in a precision injection molding connection device for automotive plastic parts according to this utility model.

[0021] Figure 4This is a schematic diagram of the lower inclined wedge block in a precision injection molding connection device for automotive plastic parts according to this utility model.

[0022] In the diagram: 1. Base plate; 2. Lower mold; 3. Upper mold; 4. Hydraulic wedge lock; 5. Insertion structure; 6. Guide sleeve; 7. Guide post; 8. First fixing block; 9. Insertion block; 10. Wedge lock groove; 11. Second fixing block; 12. Insertion groove; 13. Protective cover; 14. Hydraulic rod; 15. Sliding hole; 16. Extended guide sleeve; 17. Moving block; 18. Lower inclined wedge block; 19. Pressure sensor. Detailed Implementation

[0023] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0024] This embodiment is a precision injection molding connection device for automotive plastic parts.

[0025] like Figure 1-4 As shown, the system includes a substrate 1, a lower mold 2, and an upper mold 3. The upper mold 3 is located above the lower mold 2. The lower mold 2 is fixed to the upper outer surface of the substrate 1. Guide sleeves 6 are installed at the four corners of the upper outer surface of the lower mold 2. Guide posts 7 are fixedly installed at the four corners of the lower outer surface of the upper mold 3. Insertion structures 5 are fixedly installed on the outer surfaces of both ends of the upper mold 3. The insertion structure 5 includes a first fixing block 8 and an insertion block 9. Hydraulic wedge locks 4 are fixedly installed on the outer surfaces of both ends of the lower mold 2. The hydraulic wedge lock 4 includes a second fixing block 11, an insertion groove 12, a protective cover 13, a hydraulic rod 14, a sliding hole 15, an extension guide sleeve 16, a moving block 17, a lower inclined wedge block 18, and a pressure sensor 19. A wedge lock groove 10 is opened at the bottom of the outer surface of the front end of the insertion block 9.

[0026] The clearance between the outer wall of the guide post 7 and the guide sleeve 6 is ≤0.005mm; the first fixing block 8 is fixed to the outer surfaces of both ends of the upper mold 3, the plug-in block 9 is fixed to the lower outer surface of the first fixing block 8, the second fixing block 11 is fixed to the outer surfaces of both ends of the lower mold 2, the protective cover 13 is fixed to the bottom of the outer surface of the front end of the second fixing block 11, the hydraulic rod 14 is fixed inside the protective cover 13 at one end away from the second fixing block 11, and the moving block 17 is fixed at the middle of the outer surface of one end of the piston rod in the hydraulic rod 14 and the outer surface of one end of the lower inclined wedge block 18. The sliding hole 15 is opened at the bottom of the outer surface of the front end of the second fixed block 11. The extended guide sleeve 16 is fixed at the front end of the sliding hole 15 and is located in the protective cover 13. The outer wall of the moving block 17 and the lower inclined wedge block 18 are slidably connected to the extended guide sleeve 16 and the sliding hole 15. The insertion groove 12 is opened at the upper outer surface of the second fixed block 11. The pressure sensor 19 is fixed at the bottom of the insertion groove 12. The outer wall of the insertion block 9 is inserted into the insertion groove 12, and the outer wall of the lower inclined wedge block 18 is inserted into the wedge locking groove 10.

[0027] It should be noted that this utility model is a precision injection molding connection device for automotive plastic parts. The substrate 1, lower mold 2, and upper mold 3 described in this article are all existing technologies and can be effectively known to those skilled in the art. Specific details will not be elaborated further. The guide sleeve 6 and guide post 7 are provided. The guide post 7 has a surface hardness ≥ HRC60, an outer diameter tolerance of h5 grade, and its working section surface is mirror-polished and then plated with hard chrome with a chrome layer thickness of 0.02-0.05mm. The guide sleeve 6 has an inner hole tolerance of H6 grade, a fitting clearance with the guide post 7 ≤ 0.005mm, and a self-lubricating coating on its inner wall, thus achieving precise fit after mold closing. After the upper mold 3 and lower mold 2 are closed, the insertion block 9 is inserted into the insertion groove 12. Then, the hydraulic rod 14 drives the moving block 17 and the lower inclined wedge block 18 to move. The lower inclined wedge block 18 is inserted into the wedge locking groove 10 for mold locking. The insertion block 9 applies pressure to the pressure sensor 19, which monitors the mold closing pressure.

[0028] It should be noted that, in this document, relational terms such as first and second (number one, number two), etc., are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0029] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. A precision injection molding connection device for automotive plastic parts, comprising a base plate (1), a lower mold (2) and an upper mold (3), wherein the upper mold (3) is located above the lower mold (2), and the lower mold (2) is fixed to the upper outer surface of the base plate (1), characterized in that: The lower mold (2) has guide sleeves (6) installed at the four corners of the upper outer surface. The upper mold (3) has guide posts (7) fixedly installed at the four corners of the lower outer surface. The upper mold (3) has plug-in structures (5) fixedly installed on the outer surfaces of both ends. The plug-in structure (5) includes a first fixing block (8) and a plug-in block (9). The lower mold (2) has hydraulic wedge locks (4) fixedly installed on the outer surfaces of both ends. The hydraulic wedge locks (4) include a second fixing block (11), a plug-in groove (12), a protective cover (13), a hydraulic rod (14), a sliding hole (15), an extension guide sleeve (16), a moving block (17), a lower inclined wedge block (18), and a pressure sensor (19). The bottom of the outer surface of the front end of the plug-in block (9) is provided with a wedge lock groove (10).

2. The precision injection molding connection device for automotive plastic parts according to claim 1, characterized in that: The clearance between the outer wall of the guide post (7) and the guide sleeve (6) is ≤0.005mm.

3. The precision injection molding connection device for automotive plastic parts according to claim 2, characterized in that: The first fixing block (8) is fixed on the outer surfaces of both ends of the upper mold (3), the plug-in block (9) is fixed on the lower outer surface of the first fixing block (8), the second fixing block (11) is fixed on the outer surfaces of both ends of the lower mold (2), the protective cover (13) is fixed at the bottom of the outer surface of the front end of the second fixing block (11), the hydraulic rod (14) is fixed inside the protective cover (13) at one end away from the second fixing block (11), and the moving block (17) is fixed at the middle of the outer surface of one end of the piston rod in the hydraulic rod (14) and the outer surface of one end of the lower inclined wedge block (18).

4. The precision injection molding connection device for automotive plastic parts according to claim 3, characterized in that: The sliding hole (15) is opened at the bottom of the outer surface of the front end of the second fixed block (11). The extended guide sleeve (16) is fixed at the front end of the sliding hole (15) and the extended guide sleeve (16) is located in the protective cover (13). The outer wall of the moving block (17) and the lower inclined wedge block (18) is slidably connected to the extended guide sleeve (16) and the sliding hole (15).

5. The precision injection molding connection device for automotive plastic parts according to claim 4, characterized in that: The insertion slot (12) is opened on the upper outer surface of the second fixing block (11), and the pressure sensor (19) is fixed at the bottom of the insertion slot (12).

6. The precision injection molding connection device for automotive plastic parts according to claim 5, characterized in that: The outer wall of the plug-in block (9) is plugged into the plug-in groove (12), and the outer wall of the lower inclined wedge block (18) is plugged into the wedge locking groove (10).

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