PE multi-cavity plastic injection mold

Abstract

This utility model provides a PE multi-cavity plastic injection mold, relating to the field of injection mold technology, including: an upper mold; a punch is arranged below the upper mold, an injection hole is provided above the upper mold, and hydraulic rods are installed at the four corners below the upper mold, with the lower ends of the hydraulic rods connected to the lower mold; a concave mold is provided on the upper side of the lower mold, forming a cavity between the concave mold and the punch. This utility model facilitates demolding of the plastic part and effectively prevents excess liquid remaining in the injection hole from connecting with the already formed plastic part, thereby facilitating subsequent processing procedures, reducing unnecessary troubles, improving overall processing efficiency, and solving the problems of inconvenient demolding in existing equipment and the adhesion of excess injection liquid in the injection hole to the plastic part during cooling.

Description

Technical Field

[0001] This utility model belongs to the field of injection mold technology, and more specifically, it relates to injection molds for PE multi-cavity plastic parts. Background Technology

[0002] Multi-cavity injection molds consist of multiple cavities within a single mold, allowing for the simultaneous production of multiple identical or different injection-molded products. Also known as "one mold with multiple cavities," where "multiple cavities" refers to the number of cavities. The advantages are significant: firstly, they improve production efficiency, substantially increasing injection molding capacity by 60-80% and significantly shortening production time; secondly, they help reduce production costs, controlling the unit cost of molded plastic parts; and thirdly, they enable highly efficient and precise production, as their runner system is often designed with an "H" shape, ensuring geometric symmetry from the injection nozzle to each cavity's runner, facilitating this goal. However, multi-cavity injection molds also have drawbacks: the multiple cavities make demolding more inconvenient; and excess injection fluid from the injection holes can easily adhere to the plastic parts during cooling, increasing the complexity and difficulty of subsequent processing steps and impacting later production. Utility Model Content

[0003] To solve the above-mentioned technical problems, this utility model provides a PE multi-cavity plastic injection mold to solve the problems of inconvenient demolding of existing equipment and the adhesion of excess injection liquid in the injection hole to the plastic part during cooling.

[0004] This utility model of a multi-cavity PE plastic injection mold is achieved through the following specific technical means:

[0005] A PE multi-cavity plastic injection mold includes: an upper mold; a punch is disposed below the upper mold, an injection hole is provided above the upper mold, and hydraulic rods are installed at the four corners below the upper mold, the lower ends of the hydraulic rods are connected to the lower mold, and a cavity is provided on the upper side of the lower mold, forming a cavity between the cavity and the punch.

[0006] Furthermore, the inner wall of the concave side of the lower mold is provided with annular blades. These annular blades are extremely thin, closely attached to the edge of the concave mold, and are interconnected with each other.

[0007] Furthermore, a connecting rod is provided between two adjacent sets of annular blades, and a second electric telescopic rod is connected downward at the middle position of the connecting rod. A sliding groove is provided inside the lower mold below the annular blades.

[0008] Furthermore, a separating blade is provided above the bottom surface of the die, a connecting block is installed on the rear side of the separating blade, and a first electric telescopic rod is provided behind the connecting block.

[0009] Furthermore, the injection holes are branched outwards to the front of each punch inside the upper mold. An isolation plate is provided in the injection holes on the front side of the punch. The isolation plate is placed in the sliding groove and connected to the isolation electric telescopic rod on its rear side.

[0010] Compared with the prior art, the present invention has the following beneficial effects:

[0011] 1. By setting up an annular blade and a separating blade, this utility model can separate the plastic part from the lower mold during the demolding operation due to the adhesive force between the plastic part and the mold. When separating the upper and lower molds, the plastic part will rise with the upper mold under the action of the adhesive force, thus making it easier to complete the demolding process. In addition, both the annular blade and the separating blade are extremely thin and will not affect the size of the plastic part.

[0012] 2. By setting up an isolation plate, after the injection molding operation is completed, the isolation electric telescopic rod is operated to extend outward, so that the isolation plate can accurately block the injection hole. In this way, the excess liquid remaining in the injection hole can be effectively prevented from connecting with the molded plastic part, thereby facilitating subsequent processing procedures, reducing unnecessary troubles, and improving overall processing efficiency. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0014] Figure 2 This is a schematic diagram of the rear view structure of this utility model.

[0015] Figure 3 This is a schematic diagram of the internal structure of the lower mold of this utility model.

[0016] Figure 4 This is a schematic diagram of the cross-sectional structure of the lower mold of this utility model.

[0017] Figure 5 This is a schematic diagram of the injection hole structure of this utility model.

[0018] Figure 6 This is a schematic diagram of the connection structure of the isolation plate of this utility model.

[0019] In the diagram, the correspondence between component names and drawing numbers is as follows:

[0020] 1. Upper mold; 101. Injection hole; 102. Punch;

[0021] 2. Lower mold; 201. Cavity mold; 202. Sliding joint;

[0022] 3. Hydraulic rod;

[0023] 4. Annular blade; 401. Connecting rod; 402. First electric telescopic rod;

[0024] 5. Separating blade; 501. Connecting block;

[0025] 6. Second electric telescopic pole;

[0026] 7. Isolation plate;

[0027] 8. Isolation electric telescopic pole;

[0028] 9. Sliding groove. Detailed Implementation

[0029] The embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of this utility model.

[0030] Example:

[0031] As attached Figure 1 To be continued Figure 6 As shown:

[0032] This utility model provides a PE multi-cavity plastic injection mold, including: an upper mold 1; a punch 102 is arranged below the upper mold 1, an injection hole 101 is provided above the upper mold 1, and hydraulic rods 3 are installed at the four corners below the upper mold 1. The lower end of the hydraulic rods 3 is connected to the lower mold 2, and a cavity 201 is provided on the upper side of the lower mold 2. A cavity is formed between the cavity 201 and the punch 102.

[0033] Among them, such as Figure 3 and Figure 4 As shown, the inner wall of the concave mold 201 of the lower mold 2 is provided with annular blades 4. These annular blades 4 are extremely thin and closely adhere to the edge of the concave mold 201. The annular blades 4 are interconnected, and a connecting rod 401 is provided between two adjacent sets of annular blades 4. The middle position of the connecting rod 401 is connected downward to the second electric telescopic rod 6. A sliding groove 202 is provided inside the lower mold 2 below the annular blades 4. A separating blade 5 is provided above the bottom surface of the concave mold 201. A connecting block 501 is installed on the rear side of the separating blade 5. Behind the connecting block 501 is a first electric telescopic rod 402. When the plastic part is demolded, due to the adhesive force between the plastic part and the mold, the annular blade 4 can play a role in separating the plastic part from the lower mold 2. When the upper mold 1 and the lower mold 2 are separated, the plastic part will rise with the upper mold 1 under the action of adhesive force, which makes it easier to complete the demolding process. In addition, the annular blade 4 and the separation blade 5 are both extremely thin and will not affect the size of the plastic part.

[0034] Among them, such as Figure 5 and Figure 6 As shown, the injection hole 101 branches outwards to the front of each punch 102 inside the upper mold 1. The injection hole 101 on the front side of the punch 102 is provided with a partition plate 7. The partition plate 7 is placed in the sliding groove 9, and its rear side is connected to the isolation electric telescopic rod 8. After the injection operation is completed, the isolation electric telescopic rod 8 is operated to extend outward, so that the partition plate 7 can accurately block the injection hole 101. In this way, the excess liquid remaining in the injection hole 101 can be effectively prevented from connecting with the molded plastic part, thereby facilitating subsequent processing procedures, reducing unnecessary troubles, and improving overall processing efficiency.

[0035] The specific usage and function of this embodiment are as follows:

[0036] In this invention, the second electric telescopic rod 6 is extended, the annular blade 4 covers the side wall of the punch 201, the first electric telescopic rod 402 is retracted, the separating blade 5 retracts into the lower mold 2, the isolation electric telescopic rod 8 is retracted, the isolation plate 7 retracts into the upper mold 1, the hydraulic rod 3 is retracted, the upper mold 1 is pressed tightly against the lower mold 2, and injection is performed into the cavity through the injection hole 101. After injection is completed, the isolation electric telescopic rod 8 is extended to isolate the injection liquid in the injection hole 101. After the plastic part cools, the second electric telescopic rod 6 is retracted, the annular blade 4 detaches from the plastic part and retracts into the sliding groove 202, the first electric telescopic rod 402 is retracted, the separating blade 5 separates the plastic part from the bottom surface of the punch 201, the isolation electric telescopic rod 8 is extended, the plastic part rises with the upper mold 1, and the worker demolds and collects the plastic part.

[0037] Any aspects of this utility model not described in detail are well-known technologies to those skilled in the art.

Claims

1. PE multi-cavity plastic injection molds, including: Upper mold (1); characterized in that: a punch (102) is arranged below the upper mold (1), an injection hole (101) is provided above the upper mold (1), and hydraulic rods (3) are installed at the four corners below the upper mold (1). The lower end of the hydraulic rods (3) is connected to the lower mold (2). A cavity (201) is provided on the upper side of the lower mold (2), and a cavity is formed between the cavity (201) and the punch (102). The inner wall of the side of the cavity (201) of the lower mold (2) is provided with annular blades (4). These annular blades (4) are extremely thin and closely attached to the edge of the cavity (201), and each annular blade (4) is connected to the other. A separating blade (5) is provided above the bottom surface of the cavity (201). A connecting block (501) is installed on the rear side of the separating blade (5), and a first electric telescopic rod (402) is provided behind the connecting block (501).

2. The PE multi-cavity injection mold as described in claim 1, characterized in that: A connecting rod (401) is provided between two adjacent sets of annular blades (4). The middle position of the connecting rod (401) is connected downward to the second electric telescopic rod (6). A sliding groove (202) is provided inside the lower mold (2) below the annular blades (4).

3. The PE multi-cavity injection mold as described in claim 1, characterized in that: The injection hole (101) is branched in the upper mold (1) to the front side of each punch (102). The injection hole (101) in front of the punch (102) is provided with a partition plate (7). The partition plate (7) is placed in the sliding groove (9) and connected to the back side of the partition electric telescopic rod (8).

Images