Plastic forming die for urine sediment puncturable cover

Abstract

The utility model belongs to injection mold field, concretely relates to a urine sediment puncturable cover plastic forming die, including the cavity plate and the core plate of corresponding arrangement, make the cavity surface in the cavity plate, set up cavity double plate on the cavity plate, set up core double plate under the core plate, set up fixed distance spacing structure between the cavity plate and the cavity double plate, connect the cavity core stem under fixed distance spacing structure, make the flanging core block and arc concave for preventing residual flanging forming and puncturable sheet forming on the cavity core stem, fixedly set up the core stem on the core plate, make the thread screwing core and arc convex for thread screwing port forming and puncturable sheet forming on the core stem, the core stem corresponds with the cavity core stem, and is matched with the cavity surface, constitutes the die cavity for puncturable cover body injection molding, set up the stripper plate between the cavity plate and the core plate, make the stripper hole corresponding with the puncturable cover body on the stripper plate, and the stripper hole is contacted with the outer contour of puncturable cover body, make the top hole for injection molding machine ejector rod passing in the core plate and the core double plate, and the injection molding machine ejector rod is contacted with the stripper plate bottom surface through the top hole.

Description

Technical Field

[0001] This utility model belongs to the field of injection mold technology, specifically relating to a plastic molding mold for a puncturable cap for urine sediment. Background Technology

[0002] Urine sediment test tubes are specialized test tubes used to collect sediment after urine centrifugation, and are usually equipped with a corresponding cap at the top. Traditional test tube caps are not puncture-resistant; workers must unscrew the cap before inserting a pipette to collect the sample. During this process, odors from the urine evaporate from the test tube, causing air pollution and even viral infections. This applicant has developed a puncture-resistant (test tube) cap for urine sediment, comprising a puncture-resistant cap body, a threaded opening at the bottom, a puncture-resistant sheet at the top, and a flange at the top edge to prevent residual liquid from dripping. During sampling, a pipette (or needle, etc.) can be directly inserted into the test tube through the puncture-resistant sheet. Based on the above product structure, a plastic molding die for processing this puncture-resistant urine sediment cap needs to be designed. Summary of the Invention

[0003] The purpose of this invention is to provide a plastic molding die for processing a puncture-resistant cap for urine sediment. It adopts a two-way strong demolding structure, which makes demolding convenient, has a simple structure, and saves costs.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: A plastic molding die for a puncture-resistant cap for urine sediment includes a cavity plate and a core plate. The cavity plate has a cavity surface, a cavity cover plate is provided on the cavity plate, and a core cover plate is provided below the core plate. A spacer structure is provided between the cavity plate and the cavity cover plate. A core rod is connected below the spacer structure. The core rod has a flanged core block and an arc-shaped concave surface for preventing residual material from being rolled and for forming puncture-resistant sheets. The core rod is fixedly provided on the core plate, and a threaded connection is provided on the core rod. The mold consists of a threaded core and an arc-shaped convex surface formed by a puncture-resistant sheet molding process. The core rod corresponds to the cavity core rod and mates with the cavity surface to form a mold cavity for injection molding of the puncture-resistant cover body. A stripper plate is provided between the cavity plate and the core plate. The stripper plate has stripping holes corresponding to the puncture-resistant cover body, and the stripping holes are in contact with the outer contour of the puncture-resistant cover body. The core plate and the core cover plate have top holes for the injection molding machine ejector rod to pass through. The injection molding machine ejector rod passes through the top holes and contacts the bottom surface of the stripper plate.

[0005] Furthermore, the fixed-distance limiting structure includes a T-shaped limiting hole between the cavity plate and the cavity cover plate, and a T-shaped limiting block at the top of the cavity core rod, the T-shaped limiting block cooperating with the T-shaped limiting hole.

[0006] Furthermore, a spring groove is provided in the cavity plate, and a compression spring is provided in the spring groove. The compression spring is in contact with the top surface of the T-shaped limiting block.

[0007] Furthermore, a stripping sleeve is provided in the stripping plate, and the stripping sleeve contacts the outer contour of the puncture-resistant cover body.

[0008] Furthermore, a guide limiting structure is provided between the core plate, the stripper plate, and the cavity plate. The guide limiting structure includes a fixing hole in the core plate, a guide hole in the stripper plate, a limiting groove in the cavity plate, a guide limiting rod in the fixing hole, the guide limiting rod passing through the guide hole and extending into the limiting groove, and a guide limiting block at the top of the guide limiting rod, the guide limiting block cooperating with the limiting groove.

[0009] Furthermore, the bottom surface of the stripper plate is connected to a top block, which extends into a top hole and has an insertion hole that mates with the ejector rod of the injection molding machine.

[0010] This utility model discloses a plastic molding die for a puncturable cap for urine sediment, the advantages of which are: 1. Both the flanged core block and the threaded core are pulled out by strong pull. The extraction structure is simple. After strong extraction, the product is still flexible after molding and the plastic material itself is ductile, so that the product features can be completely restored to their original shape without being damaged or whitened, thus ensuring product quality. Second, the use of a stripper plate for material removal (demolding) eliminates the need for top plates and ejector pins inside the mold, simplifying the structure and saving costs. In particular, it can shorten the overall volume of the mold, making it suitable for small injection molding machines and greatly reducing the cost of processing equipment. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of a plastic molding die for a puncturable cap for urine sediment according to this utility model. Figure 2 yes Figure 1 A magnified view of part A; Figure 3 This is a schematic diagram of the guide and limiting structure of this utility model; Figure 4 This is a three-dimensional schematic diagram of a plastic molding die for a puncturable cap for urine sediment, which is a utility model. Detailed Implementation

[0012] The present invention will be described in detail below with reference to specific implementation examples. The following implementation examples will help those skilled in the art to further understand the present invention, but do not limit the present invention in any way.

[0013] like Figure 1 — Figure 4As shown, this utility model relates to a plastic molding die for a puncturable cap for urine sediment, including a cavity plate 1 and a core plate 2. The cavity plate 2 has a cavity surface 4, a cavity cover plate 3 is provided on the cavity plate, and a core cover plate 5 is provided below the core plate. A fixed-distance limiting structure is provided between the cavity plate 1 and the cavity cover plate 3. A cavity core rod 7 is connected below the fixed-distance limiting structure. The cavity core rod 7 has a flanged core block 6 and an arc-shaped concave surface 141 for preventing residual flange forming and for puncturable sheet forming. A core rod 9 is fixedly provided on the core plate 2. The core rod 9 has a flanged core block 6 for threaded forming and for puncturable sheet forming. The threaded core 8 and the arc-shaped convex surface 14 formed by piercing the thin sheet, the core rod 9 corresponding to the cavity core rod 7 and cooperating with the cavity surface 4, constitute the mold cavity 11 for injection molding of the pierceable cover body 10. A stripper plate 12 is provided between the cavity plate 1 and the core plate 2. The stripper plate 12 has a stripper hole 13 corresponding to the pierceable cover body 10 and the stripper hole 13 is in contact with the outer contour of the pierceable cover body 10. The core plate 2 and the core cover plate 5 have a top hole 15 for the injection molding machine ejector rod to pass through. The injection molding machine ejector rod passes through the top hole 15 and contacts the bottom surface of the stripper plate 12.

[0014] During injection molding, molten plastic raw material is injected into the mold cavity 11 through the gate of the molding die. After pressure holding and shaping, a puncture-resistant cap body 10 is obtained. The lower part of the puncture-resistant cap body is formed with a threaded opening, and the upper part of the puncture-resistant cap body (between the arc-shaped convex surface 14 and the arc-shaped concave surface 141) is formed with a puncture-resistant sheet. An anti-residue flange is formed at the flanged core block 6. Therefore, the cavity core rod 7 and the core rod 9 are actually covered by the anti-residue flange and the threaded opening, respectively. Therefore, during demolding, the core plate 2 and the cavity plate 1 are first separated by the power of the injection molding machine. The core rod 9, the puncture-resistant cap body 10, and the stripper plate 12 move with the core plate 2. At the same time, under the action of the fixed-distance limiting structure, the cavity core rod 7 moves first with the puncture-resistant cap body 10. The process begins with the core rod 7 first emerging (extending) from the cavity surface along with the puncture-resistant cover body 10. At this point, the outer contour of the cavity side of the puncture-resistant cover body 10 is demolded. Then, under the action of the fixed-distance limiting structure, the core rod 7 stops running, but the core rod 9 and the puncture-resistant cover body 10 continue to move with the core plate 2, forcibly pulling the anti-residue flange out from the flange core block 6 and the core rod 7. The mold then continues to complete the mold opening action. During this process, in conjunction with the ejector rod 28 on the injection molding machine, the ejector rod passes through the top hole 15 and pushes against the stripper plate 12, pushing the stripper plate 12 up. The stripper plate 12 then forces the threaded end of the puncture-resistant cover body 10 out from the core rod 9 and the threaded end core 8 through the stripper hole 13, thus completing the demolding. The threaded joints and anti-residue flanges in this solution are all forcibly demolded. Since the product is not completely cooled when it is first formed, it still has a certain degree of flexibility. By taking advantage of the extensibility of the plastic material itself, even if the threaded joints and anti-residue flanges are deformed to some extent during forced demolding, they will automatically return to their original shape without affecting the product quality.

[0015] Furthermore, the fixed-distance limiting structure includes a T-shaped limiting hole 16 between the cavity plate 1 and the cavity cover plate 3, and a T-shaped limiting block 17 on the top of the cavity core rod 7, which cooperates with the T-shaped limiting hole 16. After mold opening, the cavity core rod 7 is pressed down first, and it extends out of the cavity plate together with the puncture-proof cover body 10. When the T-shaped limiting block 17 slides down to the bottom of the T-shaped limiting hole 16, the pressing stops, thus forming a limiting position.

[0016] Furthermore, a spring groove 18 is provided in the cavity plate 3, and a compression spring 19 is provided in the spring groove 18. The compression spring 19 contacts the top surface of the T-shaped limiting block 17. The compression spring rests on the top surface of the T-shaped limiting block 17 and plays an auxiliary role in moving the cavity core rod 7 down together with the punctureable cover body 10.

[0017] Furthermore, to facilitate processing, a stripping sleeve 27 is provided in the stripping plate 12. The stripping sleeve 27 contacts the outer contour of the punctureable cap body 10, thereby forcibly removing the punctureable cap body 10 from the cavity core rod 7 and the threaded core 8.

[0018] Furthermore, a guide and limiting structure is provided between the core plate 2, the stripper plate 12, and the cavity plate 1. This guide and limiting structure includes a fixing hole 22 in the core plate 2, a guide hole 23 in the stripper plate 12, a limiting groove 24 in the cavity plate 1, a guide and limiting rod 25 in the fixing hole 22, the guide and limiting rod 25 passing through the guide hole 23 and extending into the limiting groove 24, and a guide and limiting block 26 at the top of the guide and limiting rod 25, which cooperates with the limiting groove 24. This guide and limiting structure makes the stripper plate more stable and reliable during the ejection and stripping process.

[0019] Furthermore, the bottom surface of the stripper plate 12 is connected to the top block 20, the top block extends into the top hole 15, and the top block 20 has an insertion hole 21 that mates with the injection molding machine ejector rod 28, the insertion hole and the injection molding machine ejector rod are precisely matched.

[0020] The above specific embodiments are used to explain and illustrate the present utility model, and are not intended to limit the present utility model. Any modifications and changes made to the present utility model within the spirit and scope of the claims shall fall within the protection scope of the present utility model.

Claims

1. A plastic molding die for a puncturable cap for urine sediment, characterized in that... The system includes a cavity plate (1) and a core plate (2) with corresponding configurations. The cavity plate (1) has a cavity surface (4). A cavity cover plate (3) is provided on the cavity plate. A core cover plate (5) is provided below the core plate. A fixed-distance limiting structure is provided between the cavity plate (1) and the cavity cover plate (3). A cavity core rod (7) is connected below the fixed-distance limiting structure. A flanging core block (6) and an arc-shaped concave surface (141) are provided on the cavity core rod (7) for preventing residual flanging and forming punctureable thin sheets. A core rod (9) is fixedly provided on the core plate (2). A threaded core (8) and an arc-shaped concave surface (141) are provided on the core rod (9) for forming threaded ends and forming punctureable thin sheets. The convex surface (14), the core rod (9) and the cavity core rod (7) correspond to each other and cooperate with the cavity surface (4) to form a mold cavity (11) for injection molding of the puncturable cover body (10). A stripper plate (12) is provided between the cavity plate (1) and the core plate (2). The stripper plate (12) has a stripper hole (13) corresponding to the puncturable cover body (10) and the stripper hole (13) is in contact with the outer contour of the puncturable cover body (10). The core plate (2) and the core cover plate (5) have a top hole (15) for the injection molding machine ejector rod to pass through. The injection molding machine ejector rod passes through the top hole (15) and contacts the bottom surface of the stripper plate (12).

2. The plastic molding die for a puncturable cap for urine sediment as described in claim 1, characterized in that... The fixed-distance limiting structure includes a T-shaped limiting hole (16) between the cavity plate (1) and the cavity composite plate (3), and a T-shaped limiting block (17) is provided on the top of the cavity core rod (7), with the T-shaped limiting block (17) cooperating with the T-shaped limiting hole (16).

3. The plastic molding die for a puncturable cap for urine sediment as described in claim 2, characterized in that... A spring groove (18) is provided in the cavity plate (3), and a compression spring (19) is provided in the spring groove (18). The compression spring (19) is in contact with the top surface of the T-shaped limiting block (17).

4. The plastic molding die for a puncturable cap for urine sediment as described in claim 1, characterized in that... The stripping plate (12) is provided with a stripping sleeve (27), which is in contact with the outer contour of the puncture-resistant cap body (10).

5. The plastic molding die for a puncturable cap for urine sediment as described in claim 1, characterized in that... A guide limiting structure is provided between the core plate (2), the stripper plate (12) and the cavity plate (1). The guide limiting structure includes a fixing hole (22) in the core plate (2), a guide hole (23) in the stripper plate (12), a limiting groove (24) in the cavity plate (1), a guide limiting rod (25) in the fixing hole (22), the guide limiting rod (25) passing through the guide hole (23) and extending into the limiting groove (24), and a guide limiting block (26) is provided at the top of the guide limiting rod (25), the guide limiting block (26) cooperating with the limiting groove (24).

6. The plastic molding die for a puncturable cap for urine sediment as described in claim 1, characterized in that... The bottom surface of the stripper plate (12) is connected to the top block (20), the top block extends into the top hole (15), and the top block (20) has an insertion hole (21) that mates with the injection molding machine ejector rod.

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