Secondary ejection layering device for side-gate injection molded parts

Abstract

The utility model discloses a side gate injection molding piece secondary ejection layered device, include: form plate has the cavity and the water mouth cavity, and the cavity is connected with first through -hole, and the water mouth cavity is connected with second through -hole, first ejection part includes first upper top plate and first lower top plate, and is equipped with first spring between first upper top plate and form plate, and first lower top plate is recessed from surface and forms the accommodation groove, and second ejection part includes the second upper top plate and second lower top plate in the accommodation groove, and first thimble and second thimble are fixedly connected with second upper top plate and second lower top plate, and first thimble enters first through -hole, and second thimble enters second through -hole, first thimble and second thimble are sleeved with second spring, and second spring respectively holds second upper top plate and form plate, and through the second thimble first ejection runner condensate, then through first thimble ejection product collocation spring buffer, completely eliminated the traditional synchronous ejection when the material head to the pulling force of product side wall, avoid the problem that product appears scratch, recess or breakage.

Description

Technical Field

[0001] This invention relates to the field of mold technology, and more particularly to a secondary ejection and layering device for side-gate injection molded parts. Background Technology

[0002] In the field of injection molding manufacturing, side gates are a common gate type and are widely used in the mold design of various plastic products, especially suitable for the production of injection molded parts with complex structures or large dimensions. After injection molding, the product is usually connected to the side gate (i.e., the sprue) as one piece, and both need to be ejected from the mold cavity by an ejection mechanism before the subsequent side gate trimming process.

[0003] However, due to the limitations of their own design (such as thin walls and complex sidewall contours) and structure, some customers' products are subject to stress concentration at the connection surface between the side gate and the product sidewall during the synchronous ejection process of traditional molds. The friction or pulling force of the side gate on the product sidewall can directly cause scratches, dents or even cracks on the sidewall, which not only damages the integrity of the product's appearance, but may also affect the structural strength of the product, resulting in a significant increase in the defect rate.

[0004] Therefore, it is necessary to develop a secondary ejection and layering device for side-gate injection molded parts to solve the above problems. Utility Model Content

[0005] The purpose of this invention is to provide a secondary ejection and layering device for side-gate injection molded parts that avoids product tearing.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a secondary ejection and layering device for side-gate injection molded parts, comprising: The template has an interconnected cavity and a water cavity, wherein the cavity is connected to a first through hole and the water cavity is connected to a second through hole; An ejection assembly includes a first ejection portion and a second ejection portion. The first ejection portion is fixedly connected to a first upper top plate and a first lower top plate. A first spring is provided between the first upper top plate and the template. The first lower top plate is recessed from its surface to form a receiving groove. The second ejection portion includes a second upper top plate and a second lower top plate fixedly connected and located in the receiving groove. A first ejector pin and a second ejector pin are fixedly connected to the second upper top plate and the second lower top plate. The first ejector pin enters the first through hole, and the second ejector pin enters the second through hole. The first ejector pin and the second ejector pin are fitted with a second spring, and the second spring abuts against the second upper top plate and the template, respectively.

[0007] Furthermore, the bottom of the first ejector pin is fixed between the second upper plate and the second lower plate, and the top extends vertically upward, penetrating the first upper plate and the first lower plate, and extending into the first through hole.

[0008] Furthermore, the bottom of the second ejector pin is fixed between the second upper plate and the second lower plate, and the top extends vertically upward, penetrating the first upper plate and the first lower plate, and extending into the second through hole.

[0009] Furthermore, the second ejector portion includes a guide member, and the guide member is provided in pairs. The second upper top plate and the second lower top plate are sleeved on the guide member and move along the guide member within the receiving groove.

[0010] Furthermore, the first ejector portion includes a limiting post, one end of which is fixed to the upper surface of the first upper top plate, and the other end extends vertically upward.

[0011] Furthermore, a plurality of guide rods are provided between the first upper top plate and the template, and the plurality of guide rods are surrounded by the first spring.

[0012] Furthermore, the ejection assembly includes an ejector rod, one end of which is connected to other driving devices, and the other end is connected to the first ejection part and the second ejection part.

[0013] Furthermore, the template includes a body and a molding plate embedded in the body, wherein the molding plate is recessed from the surface inward to form the cavity and a plurality of water inlets.

[0014] Furthermore, the first through hole extends sequentially through the molding plate and the body from the bottom of the cavity.

[0015] Furthermore, the second through hole extends sequentially from the bottom of the water inlet through the molding plate and the body.

[0016] Compared with the prior art, the beneficial effects of this utility model are as follows: This utility model is a secondary ejection and layering device for side-gate injection molded parts, which has the feature of avoiding product tearing. By independently dividing the work, the second ejector pin first ejects the solidified material in the runner, and then the first ejector pin ejects the product with spring buffer, which completely eliminates the pulling force of the material head on the side wall of the product during traditional synchronous ejection, and avoids the problem of scratches, dents or cracks in thin-walled and complex structure products from the root. Attached Figure Description

[0017] 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.

[0018] Figure 1 This is a three-dimensional structural diagram of a side-gate injection molding part secondary ejection and layering device according to the present invention; Figure 2 for Figure 1 A schematic diagram of the template structure for the secondary ejection and layering device of the side-gate injection molded part is shown. Figure 3 for Figure 1 A schematic diagram of the ejection assembly structure of the secondary ejection and layering device for side-gate injection molded parts; Figure 4 for Figure 3 An exploded view from another angle of the ejection assembly of the secondary ejection layering device for the side-gate injection molded part shown.

[0019] In the diagram: 1. Fixing plate; 2. Square iron; 3. Template; 31. Body; 32. Forming plate; 321. Cavity; 322. Water inlet; 33. First through hole; 34. Second through hole; 4. Ejection assembly; 41. Ejector rod; 42. First ejection part; 421. First upper ejector plate; 422. First lower ejector plate; 423. Limiting post; 424. Guide rod; 425. First spring; 426. Receiving groove; 43. Second ejection part; 431. Second upper ejector plate; 432. Second lower ejector plate; 433. First ejector pin; 434. Second ejector pin; 435. Second spring; 436. Guide component; 5. Clearance area. Detailed Implementation

[0020] To further illustrate the technical means and effects adopted by this utility model to achieve its intended purpose, the following, in conjunction with the accompanying drawings and preferred embodiments, details the specific implementation, structure, features, and effects of the side-gate injection molding secondary ejection and layering device proposed by this utility model. In the following description, different "one embodiment" or "another embodiment" do not necessarily refer to the same embodiment. Furthermore, specific features, structures, or characteristics in one or more embodiments can be combined in any suitable form.

[0021] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains.

[0022] The following description, in conjunction with the accompanying drawings, details the specific scheme of the secondary ejection and layering device for side-gate injection molded parts provided by this utility model.

[0023] Please refer to Figures 1 to 4 This utility model is a secondary ejection and layering device for side-gate injection molded parts, which includes a fixed plate 1, a square iron 2 and a template 3 fixedly connected to the fixed plate 1, and an ejection assembly 4.

[0024] Please refer to Figure 1 The fixing plate 1 serves as the core load-bearing and fixing component, used to fix the relative positions of the square iron 2, the template 3, and the ejection assembly 4.

[0025] There is a pair of square irons 2, which are fixed on both sides of the surface of the fixed plate 1 respectively. Their bottoms are fixedly connected to the fixed plate 1 and their tops are fixedly connected to the template 3. The square irons 2, the fixed plate 1, and the template 3 form a clearance area 5. The ejector assembly 4 is installed in the clearance area 5.

[0026] Please refer to Figure 2 The template 3 includes a body 31 and a molding plate 32 embedded in the body 31. The body 31 is fixedly connected to the square iron 2, and the molding plate 32 is fixed inside the body 31. It is recessed from the surface to form a cavity 321 and a plurality of water inlets 322. In this embodiment, the cavity 321 extends from one end of the molding plate 32 to the other end, and the plurality of water inlets 322 are located on one side of the cavity 321, and their bottoms are connected to the bottom of the cavity 321.

[0027] Accordingly, template 3 includes a first through hole 33 and a second through hole 34. The first through hole 33 passes through the molding plate 32 and the body 31 sequentially from the bottom of the cavity 321; the second through hole 34 passes through the molding plate 32 and the body 31 sequentially from the bottom of the water cavity 322.

[0028] Please refer to Figures 3 to 4 The ejector assembly 4 includes an ejector rod 41, a first ejector part 42 and a second ejector part 43 connected to the ejector rod 41.

[0029] One end of the push rod 41 is connected to other drive devices, and the other end is connected to the first ejector part 42 and the second ejector part 43.

[0030] The first ejector part 42 is located within the air-avoidance area 5, and includes a first upper top plate 421, a first lower top plate 422, and a limiting post 423. The first upper top plate 421 and the first lower top plate 422 are fixedly connected, and one end of the limiting post 423 is fixed to the upper surface of the first upper top plate 421, while the other end extends vertically upward.

[0031] Specifically, a plurality of guide rods 424 are provided between the first upper top plate 421 and the template 3, and the plurality of guide rods 424 are surrounded by a first spring 425. The two ends of the first spring 425 respectively abut against the upper surface of the first upper top plate 421 and the lower surface of the template 3. Secondly, the first lower top plate 422 is recessed inward from the lower surface to form a receiving groove 426, and the second ejector part 43 is provided in the receiving groove 426.

[0032] The second ejector part 43 is located within the clearance area 5, and includes a second upper top plate 431, a second lower top plate 432, a first ejector pin 433, and a second ejector pin 434 fixedly connected to the second upper top plate 431 and the second lower top plate 432. The second upper top plate 431 and the second lower top plate 432 are fixedly connected. The bottom of the first ejector pin 433 is fixed between the second upper top plate 431 and the second lower top plate 432, and the top extends vertically upward, penetrating the first upper top plate 421 and the first lower top plate 422, and extending into the first through hole 33. The bottom of the second ejector pin 434 is fixed between the second upper top plate 431 and the second lower top plate 432, and the top extends vertically upward, penetrating the first upper top plate 421 and the first lower top plate 422, and extending into the second through hole 34.

[0033] Specifically, the first ejector pin 433 and the second ejector pin 434 are both fitted with a second spring 435, and the two ends of the second spring 435 respectively abut against the lower surface of the template 3 and the surfaces of the second upper plate 431 and the second lower plate 432.

[0034] The second ejector part 43 includes a guide member 436. A pair of guide members 436 are provided. The bottom of the pair of guide members 436 is fixedly connected to the fixing plate 1, and the top of the guide members 436 extends vertically toward the template 3. The second upper top plate 431 and the second lower top plate 432 are sleeved on the guide members 436 and move along the guide members 436 in the receiving groove 426.

[0035] When using the side-gate injection molding part secondary ejection and layering device of this utility model, the cavity 321 of the template 3 completes injection molding, and the molten plastic is formed into an injection molded part in the cavity 321. At the same time, the runner solidified material is formed in the water inlet 322. The external driving device drives the ejector rod 41 to move upward. The ejector rod 41 simultaneously pushes the first ejector part 42 and the second ejector part 43 to move. During the movement, the second upper ejector plate 431 and the second lower ejector plate 432 drive the first ejector pin 433 and the second ejector pin 434 to move along the first through hole 33 and the second through hole 34. The second spring 435 is compressed. The second ejector pin 434 first contacts the runner solidified material in the water inlet 322. As the ejector rod 41 continues to move upward, the second ejector pin 434 first ejects the runner solidified material from the water inlet 322, completing the separation of the runner from the template 3. The push rod 41 continues to push upward, the second upper push plate 431 contacts the first lower push plate 422, pushing the first lower push plate 422 and the first upper push plate 421 to move, the first spring 425 is compressed, the first push pin 433 and the second push pin 434 continue to move, pushing out the product and the condensate in the flow channel.

[0036] This utility model is a secondary ejection and layering device for side-gate injection molded parts, which has the feature of avoiding product tearing. By independently dividing the work, the second ejector pin first ejects the solidified material in the runner, and then the first ejector pin ejects the product with spring buffer, which completely eliminates the pulling force of the material head on the side wall of the product during traditional synchronous ejection, and avoids the problem of scratches, dents or cracks in thin-walled and complex structure products from the root.

[0037] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A secondary ejection and layering device for side-gate injection molded parts, characterized in that, include: Template (3) has a cavity (321) and a water cavity (322) that are interconnected. The cavity (321) is connected to a first through hole (33), and the water cavity (322) is connected to a second through hole (34). The ejection assembly (4) includes a first ejection part (42) and a second ejection part (43). The first ejection part (42) includes a first upper top plate (421) and a first lower top plate (422) fixedly connected. A first spring (425) is provided between the first upper top plate (421) and the template (3). The first lower top plate (422) is recessed from the surface to form a receiving groove (426). The second ejection part (43) includes a second upper top plate (431) and a second lower top plate (432) fixedly connected and located in the receiving groove (426). The second upper top plate (431) and the second lower top plate (432) are fixedly connected with a first ejector pin (433) and a second ejector pin (434). The first ejector pin (433) enters the first through hole (33), and the second ejector pin (434) enters the second through hole (34). The first ejector pin (433) and the second ejector pin (434) are fitted with a second spring (435), and the second spring (435) abuts against the second upper plate (431) and the template (3) respectively.

2. The secondary ejection and layering device for side-gate injection molded parts according to claim 1, characterized in that: The bottom of the first ejector pin (433) is fixed between the second upper plate (431) and the second lower plate (432), and the top extends vertically upward, penetrating the first upper plate (421) and the first lower plate (422) and extending into the first through hole (33).

3. The secondary ejection and layering device for side-gate injection molded parts according to claim 1, characterized in that: The bottom of the second ejector pin (434) is fixed between the second upper plate (431) and the second lower plate (432), and the top extends vertically upward, penetrating the first upper plate (421) and the first lower plate (422) and extending into the second through hole (34).

4. The secondary ejection and layering device for side-gate injection molded parts according to claim 1, characterized in that: The second ejector (43) includes a guide (436), which is provided in pairs. The second upper top plate (431) and the second lower top plate (432) are sleeved on the guide (436) and move along the guide (436) within the receiving groove (426).

5. The secondary ejection and layering device for side-gate injection molded parts according to claim 1, characterized in that: The first ejector part (42) includes a limiting post (423), one end of which is fixed to the upper surface of the first upper top plate (421), and the other end extends vertically upward.

6. The secondary ejection and layering device for side-gate injection molded parts according to claim 1, characterized in that: A plurality of guide rods (424) are provided between the first upper top plate (421) and the template (3), and the plurality of guide rods (424) are surrounded by the first spring (425).

7. The secondary ejection and layering device for side-gate injection molded parts according to claim 1, characterized in that: The ejection assembly (4) includes an ejector rod (41), one end of which is connected to other driving devices, and the other end is connected to the first ejector part (42) and the second ejector part (43).

8. The secondary ejection and layering device for side-gate injection molded parts according to claim 1, characterized in that: The template (3) includes a body (31) and a molding plate (32) embedded in the body (31). The molding plate (32) is recessed from the surface to form the cavity (321) and a plurality of water cavity (322).

9. The secondary ejection and layering device for side-gate injection molded parts according to claim 8, characterized in that: The first through hole (33) passes through the molding plate (32) and the body (31) sequentially from the bottom of the cavity (321).

10. The secondary ejection and layering device for side-gate injection molded parts according to claim 8, characterized in that: The second through hole (34) passes through the molded plate (32) and the body (31) sequentially from the bottom of the water cavity (322).

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