Air spring injection mold

Abstract

This utility model relates to an air spring injection mold. An existing air spring product comprises seven identical structures made of TPU. Previous blow molding was used for testing, but issues such as uneven wall thickness and severe flash occurred. This utility model includes a mold base assembly, on which a push plate mold core assembly is mounted. The key feature is that multiple inwardly recessed blocks are arranged in a straight line at the center of the mold base assembly. Inwardly recessed cores and angled ejector blocks are distributed around the periphery of each inwardly recessed core and angled ejector block. The inwardly recessed cores are mounted on the push plate mold core assembly, and a split slider assembly is located around the inwardly recessed cores and angled ejector blocks. This utility model has a compact structure, is suitable for demolding undercut products, and is suitable for installation in small spaces.

Description

Technical Field

[0001] This utility model belongs to the field of injection mold technology, and in particular to an air spring injection mold. Background Technology

[0002] A side view of an air spring product 11 is shown below. Figure 1 As shown, it includes seven identical structures made of TPU. Previously, blow molding was used for molding verification, but defects such as uneven wall thickness and severe flash occurred.

[0003] After switching to injection molding for production, the product had three layers of undercuts of 12mm, with an undercut amount of 6mm and a double undercut amount reaching 20% ​​of the diameter. This made it impossible to use the traditional standard telescopic ejector for demolding. If a four-sided inclined ejector with inward movement and shrinkage structure were used, the internal space would not be sufficient to accommodate the four large inclined ejectors, and the two adjacent protruding inclined ejectors would also interfere with each other. Therefore, the mold structure needed to be redesigned. Summary of the Invention

[0004] To address the problems existing in the prior art, this utility model proposes an air spring injection mold with a compact structure, suitable for demolding products with internal undercuts, and suitable for installation in small spaces.

[0005] Therefore, the technical solution adopted by this utility model is: an air spring injection mold, including a mold frame assembly, on which a push plate mold core assembly is provided, characterized in that multiple inward shrinking blocks are arranged in a straight line at the center of the mold frame assembly, and inward shrinking cores and inclined ejector blocks are distributed around the periphery of the inward shrinking blocks, the inward shrinking cores are provided on the push plate mold core assembly, and a split slider assembly is provided around the inward shrinking cores and inclined ejector blocks.

[0006] Preferably, the inclined push block is connected to the push plate via an inclined push pin, and the push plate pushes the inclined push block to move.

[0007] Preferably, there are four inward-shrinking core-pulling blocks and four inclined top blocks, arranged at intervals.

[0008] Preferably, the push plate mold assembly is moved up and down by a fastening mechanism.

[0009] Preferably, the ejector plate is disposed on the base plate of the mold frame assembly.

[0010] This utility model adopts a two-stage ejection structure through an internal core-pulling and inclined ejector block design, which is suitable for demolding products with internal threads and internal inverted designs in bottle cap molds. It adopts a mechanical telescopic structure design, with a telescopic stroke of 5-7% of the product diameter on one side, replacing the expensive gear and rack system. The structure is compact and requires less installation space. Attached Figure Description

[0011] Figure 1 This is a structural diagram of the product.

[0012] Figure 2 This is a three-dimensional structural diagram of the present invention.

[0013] Figure 3 This is a schematic diagram of the structure of this utility model without the slider.

[0014] Figure 4 This is a structural diagram of the slider disengaging during mold opening according to this utility model.

[0015] Figure 5 This is a schematic diagram of the rising structure of the push plate mold core assembly of this utility model.

[0016] Figure 6 for Figure 5 A side view structural diagram of the structure.

[0017] Figure 7 This is a schematic diagram of the ejector plate structure of this utility model.

[0018] In the attached diagram: 1—Mold base assembly; 2—Push plate mold core assembly; 3—Inner retraction block; 4—Inner retraction core pull; 5—Angled ejector block; 6—Split slide assembly; 7—Angled ejector pin; 8—Ejector plate; 9—Hook and fastener; 10—Base plate; 11—Product; 12—Undercut. Detailed Implementation

[0019] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0020] like Figures 2-3 The air spring injection mold shown includes a mold base assembly 1, on which a push plate mold core assembly 2 is mounted. Multiple retractable blocks 3 are arranged in a straight line at the center of the mold base assembly 2. Retractable core pullers 4 and inclined ejector blocks 5 are distributed around the periphery of the retractable core pullers 3. The retractable core pullers 4 are mounted on the push plate mold core assembly 2. A split slider assembly 6 is located around the retractable core pullers 4 and inclined ejector blocks 5. The retractable blocks 3 are directly positioned on the mold base assembly. When the push plate mold core assembly moves the retractable core pullers 4 and inclined ejector blocks 5, the retractable core pullers disengage.

[0021] Specifically, the inclined ejector block 5 is connected to the ejector plate 8 via the inclined ejector pin 7, and the ejector plate 8 pushes the inclined ejector block 5 to move. The upward movement of the ejector plate can drive the ejector block to move upward and eject the product.

[0022] Specifically, there are four internal core pullers (4) and four angled ejector blocks (5), spaced apart from each other. The injection molding structure of the undercut part of the product is mainly composed of internal core pullers and angled ejector blocks.

[0023] Specifically, the push plate mold core assembly 2 is driven by the fastener 9 to move up and down. The upward movement of the push plate mold core assembly 2 causes the inner retracting core puller 4 and the inclined ejector block 5 to move upward.

[0024] A hollow area is formed on the upper part of the base plate of the mold frame assembly, and the ejector plate is set on the base plate 10 of the mold frame assembly. The ejector plate can move up and down to eject the ejector block.

[0025] This utility model adopts a two-stage ejection structure. During the first ejection, space is left for the inclined ejector movement; during the second ejection, the inclined ejector movement detaches the product. Specifically, as follows... Figures 4-7 As shown,

[0026] When the front and rear molds open, the locking mechanism pulls the push plate assembly 60mm away from the base plate, separating the product. The ejector plate moves 90mm, and the angled ejector moves 9.4mm, separating the product, and the robot arm removes the part. This utility model mechanism solves the problem of cylindrical products being unable to be demolded due to the large proportion of undercut in the diameter.

[0027] It should be understood that these embodiments are for illustrative purposes only and are not intended to limit the scope of the present invention. Furthermore, it should be understood that after reading the teachings of this invention, those skilled in the art can make various alterations or modifications to the invention, and these equivalent forms also fall within the scope defined by the appended claims.

Claims

1. An air spring injection mold, comprising a mold base assembly (1), wherein a push plate mold core assembly (2) is disposed on the mold base assembly (1), characterized in that... The push plate mold core assembly (2) has multiple inwardly retractable blocks (3) arranged in a straight line at the center position. Inwardly retractable cores (4) and inclined ejector blocks (5) are distributed around the periphery of the inwardly retractable cores (3). The inwardly retractable cores (4) are set on the push plate mold core assembly (2). A split slider assembly (6) is set around the inwardly retractable cores (4) and inclined ejector blocks (5).

2. The air spring injection mold according to claim 1, characterized in that... The inclined top block (5) is connected to the ejector plate (8) via the inclined ejector pin (7), and the ejector plate (8) pushes the inclined top block (5) to move.

3. The air spring injection mold according to claim 2, characterized in that... The inner core pulling (4) and the inclined top block (5) are both four in number and are arranged at intervals.

4. The air spring injection mold according to claim 3, characterized in that... The push plate mold assembly (2) is driven up and down by the buckle machine (9).

5. The air spring injection mold according to claim 4, characterized in that... The ejector plate is mounted on the base plate (10) of the mold frame assembly.

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