PVC soft rubber product blowing out of a mold

Abstract

The utility model discloses a kind of PVC soft rubber product blowout mould, including bottom plate, lower die plate, lower die, upper die plate, upper die and ejector assembly, the lower die plate is connected at bottom plate top, lower die is embedded in lower die plate top surface, upper die plate bottom surface is attached with lower die plate top surface, upper die plate bottom surface is embedded with the upper die that is attached with lower die, forming cavity between upper die and lower die, cavity is formed between bottom plate and lower die plate, ejector assembly includes the ejector insert movably arranged in lower die interior and the ejector pin plate movably arranged in cavity, the bottom end of ejector insert passes through lower die plate downwards and is connected with ejector pin plate, gas passage is opened in the interior of ejector insert, the gas top of ejector insert top end is provided with the gas connection of gas passage.The utility model pushes upwards by gas passage and makes product and ejector insert top surface separate, product can realize automatic drop-off, to improve production efficiency.

Description

Technical Field

[0001] This utility model relates to the field of injection mold technology, specifically to an air-blowing ejection mold for PVC soft rubber products. Background Technology

[0002] Injection molding is a method in which plastic material, completely molten at a certain temperature by stirring with a screw, is injected into a mold cavity under high pressure, and then cooled and solidified to obtain a finished product. This method is suitable for the mass production of complex-shaped parts and is one of the important processing methods; and the mold is a tool that shapes the blank into a part with a specific shape and size under the action of external force.

[0003] After injection molding is completed, the molded product usually needs to be demolded. Traditionally, this is done by using ejector pins, angled ejectors, ejector blocks, or push plates to eject the product from the mold. However, for soft rubber products with undercuts around the perimeter and made of PVC, these ejector pins and other structures cannot be used to eject them. Usually, most of these products need to be removed or torn off manually, which is time-consuming, labor-intensive, and has low production efficiency. Utility Model Content

[0004] The purpose of this utility model is to provide an air-blowing ejection mold for PVC soft rubber products, which can realize the automatic detachment of products and improve production efficiency, thereby solving the problems mentioned in the background art, which are time-consuming, labor-intensive and have low production efficiency due to the manual removal or tearing of products.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] An air-blowing ejection mold for PVC soft rubber products includes a base plate, a lower template, a lower mold core, an upper template, an upper mold core, and an ejection assembly. The lower template is connected to the top of the base plate, the lower mold core is embedded in the top surface of the lower template, the bottom surface of the upper template is in contact with the top surface of the lower template, and the bottom surface of the upper template is in contact with the lower mold core, forming a cavity between the upper mold core and the lower mold core. A cavity is formed between the base plate and the lower template. The ejection assembly includes an ejector insert movably disposed inside the lower mold core and an ejector plate movably disposed in the cavity. The bottom end of the ejector insert passes downward through the lower template and is connected to the ejector plate. An air passage is provided inside the ejector insert, and an air ejector connected to the air passage is provided at the top of the ejector insert.

[0007] Preferably, the gas ejector includes an ejector body and an inner insert. The top of the ejector insert has a mounting groove communicating with the gas passage. The ejector body is embedded in the mounting groove. The ejector body has a shaft hole penetrating its upper and lower surfaces. The inner insert is movably disposed in the shaft hole.

[0008] Preferably, the inner wall of the shaft hole is provided with a limiting groove and a stepped groove adjacent to the limiting groove.

[0009] Preferably, the gas cap includes a pin and a spring. The pin is inserted into the inner insert, with both ends of the pin located in the limiting groove. The spring is sleeved on the outer circumferential surface of the inner insert and located in the stepped groove. One end of the spring is connected to the pin, and the other end abuts against the top of the stepped groove.

[0010] Preferably, the diameter of the limiting groove is larger than the diameter of the stepped groove, and the length of the pin is larger than the diameter of the stepped groove.

[0011] Preferably, the bottom surface of the upper mold core is provided with an upper groove, and the top surface of the lower mold core is provided with a lower groove that mates with the upper groove. The upper groove and the lower groove mate to form the cavity.

[0012] Preferably, the bottom of the lower groove is provided with a receiving groove, and the ejector insert includes a rod part connected to the ejector plate and a shaping part connected to the top of the rod part. The shaping part is movably disposed in the receiving groove and has an elliptical cross-section. The ejector body is installed on the top surface of the shaping part.

[0013] Preferably, the ejector insert has a cooling pipe inside, which is arranged in a straight line in the rod part of the ejector insert and distributed in a circular shape in the molding part of the ejector insert.

[0014] Preferably, the upper template has a central hole in the middle that communicates with the upper groove, and a cylindrical body that extends into the molding cavity is embedded in the central hole. The lower outer circumference of the cylindrical body has a flange protruding outward.

[0015] Preferably, a core is embedded in the cylinder, and the bottom surface of the core is provided with an upwardly recessed arc-shaped groove.

[0016] Compared with the prior art, the beneficial effects of this utility model are as follows: During demolding, the upper mold core and the lower mold core are first opened by the upper and lower mold plates. After the mold is opened, the ejector plate drives the ejector insert to move upward, and the ejector insert drives the product to detach from the lower mold core. Finally, the air passage is opened, and the air ejector pushes the air ejector upward to separate the product from the top surface of the ejector insert. The product can then be automatically detached, replacing manual removal and thus improving production efficiency. Attached Figure Description

[0017] Figure 1 This is a perspective view of the PVC soft rubber product air-blowing ejection mold of this utility model;

[0018] Figure 2 This is a cross-sectional view of the PVC soft rubber product blowing ejection mold of this utility model;

[0019] Figure 3 This is an enlarged cross-sectional view of the lower mold core, upper mold core, and ejector insert of this utility model;

[0020] Figure 4 This is a cross-sectional view of the product of this utility model when the ejector insert is ejected;

[0021] Figure 5 for Figure 4 Enlarged view of point A in the middle;

[0022] Figure 6 This is a three-dimensional view of the lower mold core, upper mold core, and ejector assembly;

[0023] Figure 7 Exploded view of the lower mold core, upper mold core, and ejector components;

[0024] Figure 8 This is a 3D model of the product.

[0025] In the diagram: 1. Base plate; 2. Lower mold plate; 3. Lower mold core; 31. Lower mold groove; 32. Receiving groove; 4. Upper mold plate; 5. Upper mold core; 51. Upper mold groove; 6. Ejector assembly; 61. Ejector insert; 611. Rod body; 612. Shaping part; 62. Ejector plate; 63. Air passage; 64. Air ejector; 641. Ejector body; 6411. Shaft hole; 6412. Limiting groove; 6413. Stepped groove; 642. Inner insert; 643. Pin; 644. Spring; 65. Cooling pipe; 66. Ejector rod; 7. Product; 71. Arc-shaped body; 72. Side buckle; 73. Undercut; 74. Side extension; 8. Cylinder; 81. Flange; 9. Core; 91. Arc-shaped groove. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] Please see Figure 1-3An air-blowing ejection mold for PVC soft rubber products includes a base plate 1, a lower template 2, a lower mold core 3, an upper template 4, an upper mold core 5, and an ejection assembly 6. The lower template 2 is connected to the top of the base plate 1. The lower mold core 3 is embedded in the top surface of the lower template 2. The bottom surface of the upper template 4 is flush with the top surface of the lower template 2, and the bottom surface of the upper template 4 is fitted with the upper mold core 5, which is flush with the lower mold core 3. A cavity is formed between the upper mold core 5 and the lower mold core 3, and a product 7 is injection molded into the cavity. A cavity is formed between the base plate 1 and the lower template 2. The ejection assembly 6 includes an ejector insert 61 movably disposed inside the lower mold core 3 and an ejector plate 62 movably disposed within the cavity. The bottom end of the ejector insert 61 passes downward through the lower template 2 and connects to the ejector plate 62. An air passage 63 is provided inside the ejector insert 61, which is connected to an external air source. An air ejector 64 connected to the air passage 63 is provided at the top of the ejector insert 61.

[0028] Please see Figure 4-5 This utility model, by setting an ejector component 6, allows the upper mold core 5 and lower mold core 3 to be opened first through the upper template 4 and lower template 2 during demolding. After the mold is opened, the ejector plate 62 drives the ejector insert 61 to move upward, and the ejector insert 61 drives the product 7 to detach from the lower mold core 3. Finally, the air passage 63 is opened, and the air ejector 64 is pushed upward through the air passage 63 to separate the product 7 from the top surface of the ejector insert 61, so that the product 7 can be automatically detached, replacing manual removal and thus improving production efficiency.

[0029] Please see Figure 1-2 The base plate 1 is equipped with a cylinder (not shown) for driving the ejector plate 62 to rise and fall, so as to drive the ejector insert 61 to eject the product 7; the upper template 4 is connected to the panel and the top plate in sequence; the bottom surface of the upper mold core 5 is provided with an upper mold groove 51; the top surface of the lower mold core 3 is provided with a lower mold groove 31 that cooperates with the upper mold groove 51; the upper mold groove 51 and the lower mold groove 31 cooperate to form the cavity.

[0030] In this embodiment, six upper mold cores 5 and six lower mold cores 3 are provided between the upper mold plate 4 and the lower mold plate 2. The number of upper mold cores 5, lower mold cores 3 and ejector components 6 are equal and are installed in alignment. However, this utility model does not limit the number of upper mold cores 5, lower mold cores 3 and ejector components 6, and can be set according to the actual situation.

[0031] Please refer to Figure 5. The air top 64 includes an ejector body 641 and an inner insert 642. The top of the ejector insert 61 has a mounting groove communicating with the air passage 63. The ejector body 641 is embedded in the mounting groove, and the diameter of the mounting groove is larger than the diameter of the air passage 63. The ejector body 641 has a shaft hole 6411 penetrating its upper and lower surfaces. The inner insert 642 is movably disposed in the shaft hole 6411. The inner wall of the shaft hole 6411 has a limiting groove 6412 and a stepped groove 6413 adjacent to the limiting groove 6412. The gas cap 64 includes a pin 643 and a spring 644. The pin 643 is inserted into the inner insert 642 and is perpendicular to the inner insert 642. Both ends of the pin 643 are located in the limiting groove 6412. The spring 644 is sleeved on the outer circumferential surface of the inner insert 642 and is located in the stepped groove 6413. One end of the spring 644 is connected to the pin 643, and the other end abuts against the top of the stepped groove 6413.

[0032] In this embodiment, there are two limiting grooves 6412, which are arranged opposite to each other on the inner wall of the shaft hole 6411. The diameter of the limiting groove 6412 is larger than the diameter of the stepped groove 6413, and the length of the pin 643 is larger than the diameter of the stepped groove 6413, so that the pin 643 abuts against the opening of the stepped groove 6413. The top of the shaft hole 6411 is provided with a funnel-shaped slot, and the top of the inner insert 642 forms a conical structure that cooperates with the slot.

[0033] When the air ejector 64 pushes the product 7 out through the air passage 63, the inner insert 642 is pushed upward relative to the ejector body 641 along the shaft hole 6411 under the push of the air in the air passage 63 until the pin 643 abuts against the groove wall of the limiting groove 6412. At this time, the spring 644 is compressed by the pin 643. After the product 7 is ejected, the air passage 63 is closed, and the pin 643 drives the inner insert 642 to retract into the shaft hole 6411 under the elastic force of the spring 644, realizing automatic reset.

[0034] Please see Figure 3 The bottom of the lower groove 31 is provided with a receiving groove 32. Please refer to [reference needed]. Figure 6-7 The ejector insert 61 includes a rod portion 611 connected to the ejector plate 62 and a shaping portion 612 connected to the top of the rod portion 611. The shaping portion 612 is movably disposed within the receiving groove 32 and has an elliptical cross-section. The ejector body 641 is mounted on the top surface of the shaping portion 612. The surface of the shaping portion 612 of the ejector insert 61 is sandblasted, which allows the product 7 to be demolded from the shaping portion 612 more smoothly.

[0035] Please see Figure 5In this embodiment, a cooling pipe 65 is provided inside the ejector insert 61. The cooling pipe 65 is arranged in a straight line in the rod part 611 of the ejector insert 61 and is distributed in a circular shape in the shaping part 612 of the ejector insert 61. The circularly distributed cooling pipe 65 helps the ejector insert 61 to cool more evenly.

[0036] Please see Figure 8 Product 7 includes an arc-shaped body 71, a side buckle 72 connected to the outer periphery of the arc-shaped body 71, and an inverted buckle 73 connected to the bottom end of the arc-shaped body 71. The inverted buckle 73 is formed between the shaping part 612 and the receiving groove 32, and covers the outer periphery of the shaping part 612 of the ejector insert 61.

[0037] Please see Figure 3 as well as Figure 7 The upper template 4 has a central hole communicating with the upper groove 51, and a cylindrical body 8 extending into the molding cavity is embedded in the central hole. A core 9 is embedded inside the cylindrical body 8, and the bottom surface of the core 9 has an upwardly recessed arc-shaped groove 91. With the cooperation of the arc-shaped groove 91 and the shaping part 612, the arc-shaped body 71 of the product 7 is injection molded into the molding cavity. A flange 81 protrudes outward from the lower outer circumference of the cylindrical body 8. In this embodiment, the flange 81 is annular, and with the cooperation of the flange 81, the side buckle 72 is injection molded into the molding cavity.

[0038] In this embodiment, please refer to Figure 4 as well as Figure 8 The side buckle 72 of product 7 has a side extension 74 formed along its outer periphery tangent direction. Please refer to [link / reference]. Figure 4 The ejector plate 62 is provided with an ejector rod 66. The top end of the ejector rod 66 passes upward through the lower template 2 and the lower mold core 3 and abuts against the bottom of the side extension 74 of the product 7. It is used to lift the side extension 74 out of the lower mold core 3 from the lower groove 31 while the ejector insert 61 lifts the arc-shaped body 71 upward.

[0039] The working principle of this utility model's air-blowing ejection mold for PVC soft rubber products is as follows: Please refer to... Figure 4-5During demolding, the mold is first opened, with the upper mold plate 4 separating from the lower mold plate 2, and the upper mold core 5 and lower mold core 3 opening simultaneously to expose the product 7. Then, the ejector plate 62 moves the ejector insert 61 and ejector rod 66 upwards, causing the product 7 to detach from the lower mold slot 31 of the lower mold core 3. Next, the air passage 63 is opened, and the gas in the air passage 63 pushes the inner insert 642 of the air ejector 64 upwards, causing the product 7 to separate from the top surface of the molding part 612 of the ejector insert 61, allowing the product 7 to automatically detach. After the product 7 detaches, the air passage 63 is closed, and the pin 643, under the elastic force of the spring 644, causes the inner insert 642 to retract into the shaft hole 6411, achieving automatic reset of the inner insert 642. Finally, the ejector plate 62 moves the ejector insert 61 and ejector rod 66 downwards to reset, ready for the next mold closing.

[0040] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A blow-out ejection mold for PVC soft rubber products, comprising a base plate (1), a lower template (2), a lower mold core (3), an upper template (4), an upper mold core (5), and an ejection assembly (6), wherein the lower template (2) is connected to the top of the base plate (1), the lower mold core (3) is embedded in the top surface of the lower template (2), the bottom surface of the upper template (4) is in contact with the top surface of the lower template (2), and the bottom surface of the upper template (4) is inlaid with the upper mold core (5) which is in contact with the lower mold core (3), a cavity is formed between the upper mold core (5) and the lower mold core (3), and a cavity is formed between the base plate (1) and the lower template (2), characterized in that: The ejector assembly (6) includes an ejector insert (61) movably disposed inside the lower mold core (3) and an ejector plate (62) movably disposed inside the cavity. The bottom end of the ejector insert (61) passes downward through the lower mold plate (2) and is connected to the ejector plate (62). An air passage (63) is provided inside the ejector insert (61), and an air ejector (64) connected to the air passage (63) is provided at the top end of the ejector insert (61).

2. The PVC soft rubber product air-blowing ejector mold according to claim 1, characterized in that: The air top (64) includes an ejector body (641) and an inner insert (642). The top of the ejector insert (61) is provided with a mounting groove that communicates with the air passage (63). The ejector body (641) is embedded in the mounting groove. The ejector body (641) is provided with a shaft hole (6411) that passes through its upper and lower surfaces. The inner insert (642) is movably disposed in the shaft hole (6411).

3. The PVC soft rubber product air-blowing ejector mold according to claim 2, characterized in that: The inner wall of the shaft hole (6411) is provided with a limiting groove (6412) and a stepped groove (6413) adjacent to the limiting groove (6412).

4. The PVC soft rubber product air ejection mold according to claim 3, characterized in that: The gas cap (64) includes a pin (643) and a spring (644). The pin (643) is inserted into the inner insert (642), and both ends of the pin (643) are located in the limiting groove (6412). The spring (644) is sleeved on the outer circumference of the inner insert (642) and located in the stepped groove (6413). One end of the spring (644) is connected to the pin (643), and the other end abuts against the top of the stepped groove (6413).

5. The PVC soft rubber product air ejection mold according to claim 3 or 4, characterized in that: The diameter of the limiting groove (6412) is larger than the diameter of the stepped groove (6413), and the length of the pin (643) is larger than the diameter of the stepped groove (6413).

6. The PVC soft rubber product air ejection mold according to claim 2, characterized in that: The upper mold core (5) has an upper groove (51) on its bottom surface, and the lower mold core (3) has a lower groove (31) on its top surface that mates with the upper groove (51). The upper groove (51) and the lower groove (31) mate to form the cavity.

7. The PVC soft rubber product air-blowing ejector mold according to claim 6, characterized in that: The bottom of the lower groove (31) is provided with a receiving groove (32). The ejector insert (61) includes a rod part (611) connected to the ejector plate (62) and a shaping part (612) connected to the top of the rod part (611). The shaping part (612) is movably disposed in the receiving groove (32) and its cross-section is elliptical. The ejector body (641) is installed on the top surface of the shaping part (612).

8. The PVC soft rubber product air-blowing ejector mold according to claim 7, characterized in that: The ejector insert (61) is provided with a cooling pipe (65). The cooling pipe (65) is arranged in a straight line in the rod part (611) of the ejector insert (61) and is distributed in a circular shape in the shaping part (612) of the ejector insert (61).

9. The PVC soft rubber product blow-ejection mold according to any one of claims 6-8, characterized in that: The upper template (4) has a central hole in the middle that communicates with the upper groove (51). The central hole is fitted with a cylindrical body (8) that extends into the molding cavity. The lower outer circumference of the cylindrical body (8) protrudes outward to form a flange (81).

10. The PVC soft rubber product blow-out ejector mold according to claim 9, characterized in that: The cylinder (8) is fitted with a core (9), and the bottom surface of the core (9) is provided with an upwardly recessed arc groove (91).

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