Over-water engineering buoy short pin injection blow secondary forming mold

Abstract

The utility model belongs to the technical field of molds, and particularly relates to a water engineering buoy short pin injection blow secondary forming mold. The engineering buoy pin forming die comprises an engineering buoy pin forming lower die and an engineering buoy pin forming upper die. In the injection molding process, the engineering buoy pin molding lower mold and the engineering buoy pin molding upper mold are close to each other, so that the first buoy pin molding frame plate and the second buoy pin molding frame plate are propped against each other, and a molten material is injected into the cavity through the porous injection molding part; a plurality of connecting foot structures with hole grooves of the buoy pin can be synchronously formed through the buoy pin connecting foot forming part, then the side groove structures of the buoy pin are synchronously formed in cooperation with the buoy pin side groove forming part, secondary machining treatment is not needed, the working procedure is shortened, blow molding is conducted through the side blow molding connecting structure after injection molding is completed, and the production efficiency is improved. And the injection and blowing steps can be completed by adopting a single mold, so that the production cost is greatly reduced, and the production efficiency is improved.

Description

Technical Field

[0001] This utility model belongs to the field of mold technology and relates to a secondary molding mold for injection blowing of short pins for waterborne engineering pontoons. Background Technology

[0002] In waterborne operations, pontoons are commonly used as floats. Multiple pontoons are often connected together using short pins. To reduce weight, most existing pontoons are made of plastic. Plastic pontoons are not only lightweight but also easier to manufacture. The connecting pins include metal and plastic pins. Metal pins are heavy and prone to rusting, so using plastic pins overcomes the disadvantages of metal pins. Plastic pins consist of a pin cap and a pin rod, and are typically manufactured using injection molding followed by blow molding. Current molds for these pontoon pins in waterborne engineering generally require two molds: an injection mold and a blow mold. Using a single mold makes it difficult to achieve a single injection-blow molding process for the plastic parts, resulting in high production costs and relatively low production efficiency. Therefore, there is an urgent need to design a secondary injection-blow molding mold for pontoon pins in waterborne engineering that can overcome these shortcomings.

[0003] To overcome the shortcomings of existing technologies, people have continuously explored and proposed various solutions. For example, Chinese patent discloses a demolding mechanism for a short pin head mold of a floating pontoon in water engineering [application number: 201620089687.5]. It includes a fixed template and a moving template. The fixed template is provided with a feed port and a fixed mold is connected to the bottom of the fixed template. The moving template is provided with mold feet. An upper push plate and a lower push plate are provided between the mold feet. A push rod is connected to the upper push plate. An upper top plate is connected to the push rod. The moving mold is provided on the upper top plate. An ejector pin hole is made in the moving template. The upper top plate is connected to an ejector rod. A left core and a right core are provided in the fixed mold. A core mold is provided between the left core and the right core. The left core is driven by the left piston rod of the left cylinder, and the right core is driven by the right piston rod of the right cylinder. There is a mold cavity between the left core, the right core, the fixed mold and the core mold. The mold cavity contains an injection-molded pin head. The pin head has an annular outer groove and an inner retaining ring. The injection-molded pin head is used as an insert, and the cap of the short pin is formed by secondary blow molding. However, this method still makes it difficult to achieve one-piece injection-blow molding of the plastic part using a single mold, resulting in higher production costs and relatively low production efficiency. Utility Model Content

[0004] The purpose of this utility model is to address the above-mentioned problems by providing a secondary molding die for injection molding of short pins for pontoons in water engineering.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A secondary injection-blown molding die for short pontoon pins in marine engineering includes a lower mold for forming pontoon pins and an upper mold for forming pontoon pins. The upper mold for forming pontoon pins has a porous injection molding section. A first pontoon pin forming frame plate and a second pontoon pin forming frame plate are provided between the lower mold and the upper mold. A side blow molding connection structure and a pontoon pin connecting foot forming section are provided between the first pontoon pin forming frame plate and the second pontoon pin forming frame plate. A pontoon pin side groove forming part is provided between the second pontoon pin forming frame plate and the lower mold for forming pontoon pins.

[0007] In the above-mentioned secondary injection molding mold for short pins of pontoons in water engineering, the side blow molding connection structure includes an upper blow molding half-cylinder and a lower blow molding half-cylinder disposed between the first pontoon pin forming frame plate and the second pontoon pin forming frame plate. The upper blow molding half-cylinder and the lower blow molding half-cylinder abut against each other to form a complete blow molding connection cylinder.

[0008] In the above-mentioned secondary molding die for short pin injection molding of pontoon in water engineering, the first pontoon pin forming frame plate is provided with a first alignment groove, and the upper blow-molded half cylinder is engaged with the first alignment groove.

[0009] In the above-mentioned secondary molding die for short pin injection molding of pontoon in water engineering, the upper blow molding half cylinder is provided with two first screw holes, and the first alignment groove is provided with a first alignment connection hole, with the first screw hole and the first alignment connection hole facing each other.

[0010] In the above-mentioned secondary molding die for short pin injection molding of pontoon in water engineering, the second pontoon pin forming frame plate is provided with a second alignment groove, and the lower blow-molded half cylinder is engaged with the second alignment groove.

[0011] In the above-mentioned secondary molding die for short pin injection molding of pontoon in water engineering, the lower blow molding half cylinder is provided with two second screw holes, and the second alignment groove is provided with a second alignment connection hole, with the second screw hole and the second alignment connection hole facing each other.

[0012] In the above-mentioned secondary molding die for injection molding of short pontoon pins in water engineering, the pontoon pin side groove forming component includes a plurality of pontoon pin side groove forming blocks disposed between the second pontoon pin forming frame plate and the lower mold for forming pontoon pins in engineering, and the pontoon pin side groove forming blocks are slidably engaged with the lower mold for forming pontoon pins in engineering.

[0013] In the above-mentioned secondary molding die for injection molding of short pontoon pins in water engineering, the second pontoon pin forming frame plate is provided with a limiting and fixing groove, and the pontoon pin side groove forming block has a step, which abuts against the limiting and fixing groove.

[0014] In the above-mentioned secondary molding die for injection molding of short pontoon pins in water engineering, the pontoon pin connecting foot forming part includes a connecting foot hole groove forming insert shaft disposed between the first pontoon pin forming frame plate and the second pontoon pin forming frame plate. The first pontoon pin forming frame plate is provided with a plurality of first connecting foot forming grooves, and the second pontoon pin forming frame plate is provided with a plurality of second connecting foot forming grooves. The connecting foot hole groove forming insert shaft is located between the first connecting foot forming grooves and the second connecting foot forming grooves.

[0015] In the above-mentioned secondary injection molding die for short pins of floating pontoons in water engineering, the porous injection molding part includes a plurality of injection holes disposed in the upper mold for forming the pontoon pins.

[0016] Compared with existing technologies, the advantages of this utility model are:

[0017] 1. In the injection molding process of this utility model, the lower mold and the upper mold of the engineering pontoon pin are brought close together, so that the first pontoon pin forming frame plate and the second pontoon pin forming frame plate abut against each other. The molten material is injected into the cavity through the multi-hole injection molding part. The pontoon pin connecting foot forming part can simultaneously form multiple connecting foot structures with holes and grooves of the pontoon pin. In addition, the pontoon pin side groove forming part is used to simultaneously form the side groove structure of the pontoon pin. No secondary processing is required, which shortens the process. After injection molding, blow molding is performed through the side blow molding connection structure to complete the injection and blow molding of the plastic part. The injection and blow molding steps can be completed with a single mold, which greatly reduces the production cost and improves the production efficiency.

[0018] 2. During injection molding, the step abuts against the limiting and fixing groove, preventing the float pin side groove molding block from sliding or shaking, thus ensuring good stability and accuracy.

[0019] Other advantages, objectives and features of this invention will be partly apparent from the following description, and partly understood by those skilled in the art through study and practice of this invention. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of this utility model.

[0021] Figure 2 This is a partial structural schematic diagram of the present invention.

[0022] Figure 3 This is a structural schematic diagram of the first pontoon pin forming frame plate.

[0023] Figure 4 This is a schematic diagram of the structure of the second float pin forming frame plate.

[0024] Figure 5 This is a schematic diagram of the side blow molding connection structure.

[0025] Figure 6 This is a partial structural schematic diagram of another aspect of this utility model.

[0026] In the diagram: 1. Lower mold for forming engineering pontoon pins; 2. Upper mold for forming engineering pontoon pins; 3. Multi-hole injection molding part; 4. First pontoon pin forming frame plate; 5. Second pontoon pin forming frame plate; 6. Side blow molding connection structure; 7. Pontoon pin connecting foot forming part; 8. Pontoon pin side groove forming part; 9. Upper blow molding half cylinder; 10. Lower blow molding half cylinder; 11. Blow molding connecting cylinder; 12. First alignment groove; 13. First alignment connecting hole; 14. Second alignment groove; 15. Second screw hole; 16. Second alignment connecting hole; 17. Pontoon pin side groove forming block; 18. Limiting and fixing groove; 19. Step; 20. Connecting foot hole groove forming insert shaft; 21. First connecting foot forming groove; 22. Second connecting foot forming groove; 23. Injection hole; 24. Detailed Implementation

[0027] The present invention will be further described below with reference to the accompanying drawings.

[0028] like Figure 1-6 As shown, a secondary injection-blown molding die for short pontoons in water engineering includes a lower mold 1 for forming pontoons pins and an upper mold 2 for forming pontoons pins. The upper mold 2 is provided with a porous injection molding part 3. A first pontoon pin forming frame plate 4 and a second pontoon pin forming frame plate 5 are provided between the lower mold 1 and the upper mold 2. A side blow molding connection structure 6 and a pontoon pin connecting foot forming part 7 are provided between the first pontoon pin forming frame plate 4 and the second pontoon pin forming frame plate 5. A pontoon pin side groove forming part 8 is provided between the second pontoon pin forming frame plate 5 and the lower mold 1.

[0029] In this embodiment, during the injection molding process, the lower mold 1 and the upper mold 2 for forming the engineering pontoon pin are brought close together, so that the first pontoon pin forming frame plate 4 and the second pontoon pin forming frame plate 5 abut against each other. The molten material is injected into the cavity through the porous injection molding part 3. The multiple connecting foot structures with holes and grooves of the pontoon pin can be formed simultaneously through the pontoon pin connecting foot forming part 7. In addition, the pontoon pin side groove forming part 8 is used to form the side groove structure of the pontoon pin simultaneously. No secondary processing is required, which shortens the process. After injection molding, blow molding is performed through the side blow molding connecting structure 6 to complete the injection-blow molding of the plastic part. The injection-blow molding process can be completed with a single mold, which greatly reduces the production cost and improves the production efficiency.

[0030] Combination Figure 1-5 As shown, the side blow molding connection structure 6 includes an upper blow molding half cylinder 9 and a lower blow molding half cylinder 10 disposed between the first float pin forming frame plate 4 and the second float pin forming frame plate 5. The upper blow molding half cylinder 9 and the lower blow molding half cylinder 10 abut against each other to form a complete blow molding connection cylinder 11.

[0031] Specifically, after injection molding, the upper blow molding half-cylinder 9 and the lower blow molding half-cylinder 10 abut against each other to form a complete blow molding connecting cylinder 11, which is used in conjunction with the blow molding machine to perform blow molding, thus completing the injection and blow molding of the plastic part. The injection and blow molding process can be completed with a single mold, which greatly reduces production costs and improves production efficiency.

[0032] The first float pin forming frame plate 4 is provided with a first alignment groove 12, and the upper blow-molded half cylinder 9 is engaged with the first alignment groove 12.

[0033] In this embodiment, the first alignment groove 12 is used to install and fix the upper blow-molded half-cylinder 9.

[0034] Combination Figure 2-5 As shown, the upper blow-molded half-cylinder 9 is provided with two first screw holes 13, and the first alignment groove 12 is provided with a first alignment connection hole 14. The first screw holes 13 and the first alignment connection hole 14 are arranged opposite each other.

[0035] In this embodiment, during installation, the first screw hole 13 is aligned with the first alignment connection hole 14, and the upper blow-molded half cylinder 9 is connected and fixed to the first float pin forming frame plate 4 by bolts. This provides a good fixing effect and facilitates subsequent maintenance and replacement.

[0036] The second float pin forming frame plate 5 is provided with a second alignment groove 15, and the lower blow-molded half cylinder 10 is engaged with the second alignment groove 15.

[0037] In this embodiment, the second alignment groove 15 is used to install and fix the lower blow-molded half cylinder 10.

[0038] Combination Figure 2-5 As shown, the lower blow molding half cylinder 10 is provided with two second screw holes 16, and the second alignment groove 15 is provided with a second alignment connection hole 17. The second screw holes 16 and the second alignment connection hole 17 are arranged opposite each other.

[0039] In this embodiment, during installation, the second screw hole 16 and the second alignment connection hole 17 are aligned, and the lower blow-molded half cylinder 10 and the second float pin forming frame plate 5 are connected and fixed by bolts. This provides a good fixing effect and facilitates subsequent maintenance and replacement.

[0040] The pontoon pin side groove forming component 8 includes a plurality of pontoon pin side groove forming blocks 18 disposed between the second pontoon pin forming frame plate 5 and the engineering pontoon pin forming lower mold 1, and the pontoon pin side groove forming blocks 18 are slidably engaged with the engineering pontoon pin forming lower mold 1.

[0041] In this embodiment, during the injection molding process, the float pin side groove forming block 18 can simultaneously form the side groove structure of the float pin, eliminating the need for secondary processing and shortening the process.

[0042] Combination Figure 1-2 As shown, the second float pin forming frame plate 5 is provided with a limiting and fixing groove 19, and the float pin side groove forming block 18 has a step 20, which abuts against the limiting and fixing groove 19.

[0043] In this embodiment, during injection molding, the step 20 abuts against the limiting and fixing groove 19 to prevent the float pin side groove molding block 18 from sliding or shaking, resulting in better stability and accuracy.

[0044] Combination Figure 1-4 As shown, the float pin connecting foot forming part 7 includes a connecting foot hole groove forming insert 21 disposed between the first float pin forming frame plate 4 and the second float pin forming frame plate 5. The first float pin forming frame plate 4 is provided with a plurality of first connecting foot forming grooves 22, and the second float pin forming frame plate 5 is provided with a plurality of second connecting foot forming grooves 23. The connecting foot hole groove forming insert 21 is located between the first connecting foot forming grooves 22 and the second connecting foot forming grooves 23.

[0045] In this embodiment, during the injection molding process, the first connecting foot forming groove 22 and the second connecting foot forming groove 23 cooperate with the connecting foot hole groove forming insert 21 to simultaneously form multiple connecting foot structures with hole grooves for the float pin.

[0046] Combination Figure 1 As shown, the porous injection molding part 3 includes a plurality of injection holes 24 disposed in the upper mold 2 for forming engineering float pins.

[0047] In this embodiment, during injection molding, molten material is injected into the cavity through the injection hole 24.

[0048] The working principle of this utility model is as follows:

[0049] During injection molding, the lower mold 1 and upper mold 2 for forming the engineering float pin are brought close together, causing the first float pin forming frame plate 4 and the second float pin forming frame plate 5 to abut against each other. Molten material is injected into the cavity through the injection hole 24. The first connecting foot forming groove 22 and the second connecting foot forming groove 23, together with the connecting foot hole groove forming insert 21, can simultaneously form multiple connecting foot structures with holes and grooves for the float pin. In addition, with the float pin side groove forming block 18, the side groove structure of the float pin can be formed simultaneously. No secondary processing is required, shortening the process. After injection molding, the upper blow molding half cylinder 9 and the lower blow molding half cylinder 10 abut against each other to form a complete blow molding connecting cylinder 11. Together with the blow molding machine, blow molding is performed to complete the injection-blow molding of the plastic part. The injection-blow molding process can be completed with a single mold, which greatly reduces production costs and improves production efficiency.

[0050] The first alignment groove 12 is used to install and fix the upper blow-molded half-cylinder 9. During installation, the first screw hole 13 is aligned with the first alignment connection hole 14, and then the upper blow-molded half-cylinder 9 is connected and fixed to the first float pin forming frame plate 4 by bolts. This provides a good fixing effect and facilitates subsequent maintenance and replacement.

[0051] The second alignment groove 15 is used to install and fix the lower blow-molded half-cylinder 10. During installation, the second screw hole 16 is aligned with the second alignment connection hole 17, and then the lower blow-molded half-cylinder 10 is connected and fixed to the second float pin forming frame plate 5 by bolts. This provides a good fixing effect and facilitates subsequent maintenance and replacement.

[0052] During injection molding, the step 20 abuts against the limiting and fixing groove 19 to prevent the float pin side groove molding block 18 from sliding or shaking, resulting in better stability and accuracy.

[0053] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to replace them, without departing from the spirit of this utility model.

[0054] Although this article frequently uses terms such as engineering pontoon pin forming lower mold 1, engineering pontoon pin forming upper mold 2, multi-hole injection molding part 3, first pontoon pin forming frame plate 4, second pontoon pin forming frame plate 5, side blow molding connection structure 6, pontoon pin connecting foot forming part 7, pontoon pin side groove forming part 8, upper blow molding half cylinder 9, lower blow molding half cylinder 10, blow molding connecting cylinder 11, first alignment groove 12, first screw hole 13, first alignment connecting hole 14, second alignment groove 15, second screw hole 16, second alignment connecting hole 17, pontoon pin side groove forming block 18, limiting fixing groove 19, step 20, connecting foot hole groove forming insert 21, first connecting foot forming groove 22, second connecting foot forming groove 23, injection hole 24, etc., the possibility of using other terms is not excluded. The use of these terms is merely for the convenience of describing and explaining the essence of this utility model; interpreting them as any additional limitation would contradict the spirit of this utility model.

Claims

1. A secondary molding die for injection molding of short pins for pontoons in water engineering projects, comprising a lower mold (1) for forming pontoon pins and an upper mold (2) for forming pontoon pins, characterized in that, The upper mold (2) for forming engineering pontoon pins is provided with a multi-hole injection molding part (3). The lower mold (1) for forming engineering pontoon pins and the upper mold (2) for forming engineering pontoon pins are provided with a first pontoon pin forming frame plate (4) and a second pontoon pin forming frame plate (5). The first pontoon pin forming frame plate (4) and the second pontoon pin forming frame plate (5) are provided with a side blow molding connection structure (6) and a pontoon pin connecting foot forming part (7). The second pontoon pin forming frame plate (5) and the lower mold (1) for forming engineering pontoon pins are provided with a pontoon pin side groove forming part (8).

2. The secondary molding die for injection molding of short pins for pontoons in water engineering according to claim 1, characterized in that, The side blow molding connection structure (6) includes an upper blow molding half cylinder (9) and a lower blow molding half cylinder (10) disposed between the first float pin forming frame plate (4) and the second float pin forming frame plate (5). The upper blow molding half cylinder (9) and the lower blow molding half cylinder (10) abut against each other to form a complete blow molding connection cylinder (11).

3. The secondary molding die for injection molding of short pins for pontoons in water engineering according to claim 2, characterized in that, The first float pin forming frame plate (4) is provided with a first alignment groove (12), and the upper blow-molded half cylinder (9) is engaged with the first alignment groove (12).

4. The secondary molding die for injection molding of short pins for pontoons in water engineering according to claim 3, characterized in that, The upper blow-molded half cylinder (9) is provided with two first screw holes (13), and the first alignment groove (12) is provided with a first alignment connection hole (14). The first screw holes (13) and the first alignment connection hole (14) are arranged opposite each other.

5. The secondary molding die for injection molding of short pins for pontoons in water engineering according to claim 4, characterized in that, The second float pin forming frame plate (5) is provided with a second alignment groove (15), and the lower blow-molded half cylinder (10) is engaged with the second alignment groove (15).

6. The secondary molding die for injection molding of short pins for pontoons in water engineering according to claim 5, characterized in that, The lower blow-molded half cylinder (10) is provided with two second screw holes (16), and the second alignment groove (15) is provided with a second alignment connection hole (17). The second screw holes (16) and the second alignment connection hole (17) are arranged opposite each other.

7. The secondary molding die for injection molding of short pins for pontoons in water engineering according to claim 6, characterized in that, The pontoon pin side groove forming part (8) includes a plurality of pontoon pin side groove forming blocks (18) disposed between the second pontoon pin forming frame plate (5) and the engineering pontoon pin forming lower mold (1), and the pontoon pin side groove forming blocks (18) are slidably engaged with the engineering pontoon pin forming lower mold (1).

8. The secondary molding die for injection molding of short pins for pontoons in water engineering according to claim 7, characterized in that, The second float pin forming frame plate (5) is provided with a limiting and fixing groove (19), and the float pin side groove forming block (18) has a step (20), which abuts against the limiting and fixing groove (19).

9. The secondary molding die for injection molding of short pins for pontoons in water engineering according to claim 8, characterized in that, The float pin connecting foot forming part (7) includes a connecting foot hole groove forming insert (21) disposed between the first float pin forming frame plate (4) and the second float pin forming frame plate (5). The first float pin forming frame plate (4) is provided with a plurality of first connecting foot forming grooves (22), and the second float pin forming frame plate (5) is provided with a plurality of second connecting foot forming grooves (23). The connecting foot hole groove forming insert (21) is located between the first connecting foot forming grooves (22) and the second connecting foot forming grooves (23).

10. The secondary molding die for injection molding of short pins for pontoons in water engineering according to claim 9, characterized in that, The porous injection molding part (3) includes a plurality of injection holes (24) disposed in the upper mold (2) for forming engineering float pins.

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