Injection molding foaming mold for plastic plate

Abstract

The utility model provides an injection molding foaming mold for a plastic plate, and belongs to the technical field of plastic injection molding. The injection foaming mold for the plastic plate comprises an upper top plate, a runner plate, an upper mounting plate, an upper mold core, a lower mold core, a foaming moving plate, a lower mounting plate, an ejector plate, a vertical plate and a lower bottom plate, and is characterized in that the upper top plate, the runner plate and the upper mounting plate are sequentially fixed together through bolts, and an embedding groove is formed in the lower end face of the upper mounting plate; the upper mold core is clamped and embedded in the embedding groove and fixed through a bolt, forming cavities distributed in a matrix mode are formed in the lower end face of the upper mold core, a square through hole allowing the lower mold core to be embedded is formed in the foaming moving plate, the lower mold core is fixed to the lower mounting plate through a bolt, a foaming air cylinder is arranged in each containing groove, and a telescopic rod of each foaming air cylinder is connected with the foaming moving plate. The foaming air cylinder pushes the foaming moving plate to move upwards, so that the upper mold core and the upper mounting plate move upwards by a preset distance together, the height of the forming cavity is increased, and a plastic plate has a foaming space.

Description

Technical Field

[0001] The utility model belongs to the technical field of plastic injection molding and relates to an injection molding foaming mold for a plastic plate. Background Art

[0002] A cutting board is a kitchen utensil commonly used in people's daily life. Traditional cutting boards are made of wood materials. Plastic cutting boards made of plastic are more durable and have a longer service life than wood materials. Such plastic cutting boards in the prior art are usually made of integral plastic boards by injection molding. If such plastic cutting boards are made too thick, they will be inconvenient for people to use due to their heavy weight. Therefore, people need to foam them after injection molding to increase the thickness of the cutting board, so that the cutting board of the same thickness is lighter. Therefore, it is necessary to design an injection molding foaming mold to produce plastic board products. Utility Model Content

[0003] The purpose of the utility model is to address the above-mentioned problems in the existing technology and to propose an injection foaming mold for a plastic plate. A foaming movable plate is pushed up by a foaming cylinder, so that the upper mold core and the upper mounting plate are moved up a preset distance together, thereby increasing the height of the molding cavity and providing the plastic plate with a foaming space.

[0004] The purpose of the utility model can be achieved through the following technical solutions: an injection foaming mold for a plastic plate, comprising an upper top plate, a flow channel plate, an upper mounting plate, an upper mold core, a lower mold core, a foaming movable plate, a lower mounting plate, a material ejector plate, a vertical plate and a lower bottom plate, characterized in that the upper top plate, the flow channel plate and the upper mounting plate are fixed together in sequence by bolts, the lower end surface of the upper mounting plate is provided with an embedding groove, the upper mold core is embedded in the embedding groove and fixed by bolts, the lower end surface of the upper mold core is provided with a forming cavity distributed in a matrix, the foaming movable plate is provided with a square through hole for the lower mold core to be embedded, the lower mold core is fixed to the lower mounting plate by bolts, the forming cavity of the lower mold core is aligned with that of the upper mold core, a plurality of accommodating grooves are provided around the lower mounting plate, a foaming cylinder is provided in each accommodating groove, the telescopic rod of the foaming cylinder is connected to the foaming movable plate, the lower mounting plate, the vertical plate and the lower bottom plate are fixed in sequence by bolts, the material ejector plate is located between the two vertical plates, a material ejector rod is fixed to the material ejector plate, and the material ejector rod passes through the lower mounting plate and the lower mold core in sequence.

[0005] Furthermore, a threaded hole is formed at the upper end of the telescopic rod of the foaming cylinder, and a plurality of limiting holes are formed around the periphery of the foaming movable plate. Limiting bolts are passed through the limiting holes, and the lower ends of the limiting bolts are connected to the threaded holes.

[0006] Furthermore, a diversion pipe is fixed in the flow channel plate, the inlet of the diversion pipe is connected to the injection port located on the upper top plate, the outlet of the diversion pipe is connected to several injection heads vertically penetrating the upper mounting plate, and the lower end of the injection head is connected to the molding cavity of the upper mold core.

[0007] Furthermore, a step 1 is provided on the foaming movable plate, and the step 1 abuts against the upper mold core.

[0008] Furthermore, a second step is provided on the foaming movable plate, and the second step abuts against the upper mounting plate.

[0009] Furthermore, a guide column is fixed on the lower base plate, a guide hole for the guide column to pass through is opened on the top plate, and the upper end of the guide column is against the lower mounting plate.

[0010] Connect the injection feeding pipe to the injection port, inject molten plastic material into the mold, and the plastic material flows into the molding cavity through the diversion pipe and the injection head at last. After it is filled, it will foam. Start the foaming cylinder, and extend the telescopic rod to a certain distance to increase the distance between the lower mold core and the upper mold core, and increase the height of the molding cavity. Then the thickness of the foamed plastic sheet will increase. After cooling and shaping, the ejector plate will be opened by the unloading cylinder, and the product will be ejected by the ejector rod.

[0011] Compared with the prior art, the injection foaming mold of the plastic plate has the following advantages:

[0012] 1. The foaming cylinder pushes the foaming movable plate upward, so that the upper mold core and the upper mounting plate move up a preset distance, thereby increasing the height of the molding cavity, so that the plastic sheet has foaming space, and foamed plastic sheets can be produced. The plastic sheet produced by this injection foaming mold is thick and light.

[0013] 2. Multiple plastic sheets can be foamed at one time, with fast molding speed and high production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a three-dimensional diagram of the injection foaming mold of the plastic plate.

[0015] Figure 2 It is a cross-sectional view of the injection foaming mold of the plastic plate.

[0016] Figure 3 It is a front view of the foaming moving plate.

[0017] In the figure, 1, upper top plate; 2, runner plate; 21, diversion pipe; 22, injection port; 23, injection head; 3, upper mounting plate; 4, upper mold core; 41, molding cavity; 5, lower mold core; 6, foaming moving plate; 61, square through hole; 62, step one; 63, step two; 64, limiting hole; 7, lower mounting plate; 71, receiving groove; 8, ejector plate; 9, vertical plate; 10, lower bottom plate; 11, foaming cylinder; 111, telescopic rod; 12, ejector rod; 121, guide hole; 13, limiting bolt; 14, guide column. DETAILED DESCRIPTION

[0018] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0019] like Figure 1 , Figure 2 As shown, the injection foaming mold of the plastic plate includes an upper top plate 1, a flow channel plate 2, an upper mounting plate 3, an upper mold core 4, a lower mold core 5, a foaming movable plate 6, a lower mounting plate 7, a top plate 8, a vertical plate 9 and a lower bottom plate 10. The upper top plate 1, the flow channel plate 2 and the upper mounting plate 3 are fixed together in sequence by bolts. The lower end surface of the upper mounting plate 3 is provided with an embedding groove, the upper mold core 4 is embedded in the embedding groove and fixed by bolts, and the lower end surface of the upper mold core 4 is provided with a molding cavity 41 distributed in a matrix.

[0020] The foaming movable plate 6 is provided with a square through hole 61 for the lower mold core 5 to be embedded. The lower mold core 5 is fixed to the lower mounting plate 7 by bolts. The lower mold core 5 is aligned with the molding cavity 41 of the upper mold core 4. The periphery of the lower mounting plate 7 is provided with a plurality of accommodating grooves 71. Each accommodating groove 71 is provided with a foaming cylinder 11. The telescopic rod 111 of the foaming cylinder 11 is connected to the foaming movable plate 6. The lower mounting plate 7, the vertical plate 9 and the lower bottom plate 10 are fixed in sequence by bolts. The ejector plate 8 is located between the two vertical plates 9. A ejector rod 12 is fixed to the ejector plate 8. The ejector rod 12 passes through the lower mounting plate 7 and the lower mold core 5 in sequence.

[0021] A threaded hole is formed at the upper end of the telescopic rod 111 of the foaming cylinder 11, and a plurality of limiting holes 64 are formed around the foaming movable plate 6. The limiting holes 64 are penetrated by limiting bolts 13, and the lower ends of the limiting bolts 13 are connected to the threaded holes.

[0022] A shunt pipe 21 is fixed in the flow channel plate 2, the inlet of the shunt pipe 21 is connected to the injection port 22 located on the upper top plate 1, the outlet of the shunt pipe 21 is connected to a plurality of injection heads 23 vertically penetrating the upper mounting plate 3, and the lower end of the injection head 23 is connected to the molding cavity 41 of the upper mold core 4.

[0023] like Figure 3 As shown, the foaming movable plate 6 is provided with a step 1 62 , which abuts against the upper mold core 4 , and the foaming movable plate 6 is provided with a step 2 63 , which abuts against the upper mounting plate 3 .

[0024] A guide column 14 is fixed on the lower base plate 10 , and a guide hole 121 for the guide column 14 to pass through is opened on the ejection plate 8 , and the upper end of the guide column 14 abuts against the lower mounting plate 7 .

[0025] The injection feeding pipe is connected to the injection port 22, and the molten plastic material is injected into the mold. The plastic material passes through the shunt pipe 21 and finally flows into the molding cavity 41 from the injection head 23. After being filled, foaming is performed, and the foaming cylinder 11 is started. The telescopic rod 111 extends a certain distance, so that the distance between the lower mold core 5 and the upper mold core 4 is increased, and the height of the molding cavity 41 becomes larger, so that the thickness of the foamed plastic plate increases. After cooling and shaping, the ejector plate 8 is pushed open by the unloading cylinder, and the product is ejected by the ejector rod 12.

[0026] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. A plastic plate injection foaming mold, comprising an upper top plate (1), a runner plate (2), an upper mounting plate (3), an upper mold core (4), a lower mold core (5), a foaming movable plate (6), a lower mounting plate (7), a top plate (8), a vertical plate (9) and a lower bottom plate (10), characterized in that: The upper top plate (1), the flow channel plate (2), and the upper mounting plate (3) are fixed together in sequence by bolts; the lower end surface of the upper mounting plate (3) is provided with an embedding groove, the upper mold core (4) is embedded in the embedding groove and fixed by bolts; the lower end surface of the upper mold core (4) is provided with a molding cavity (41) distributed in a matrix; the foaming movable plate (6) is provided with a square through hole (61) for the lower mold core (5) to be embedded; the lower mold core (5) is fixed to the lower mounting plate (7) by bolts; the molding cavity (41) of the lower mold core (5) is aligned with that of the upper mold core (4) The lower mounting plate (7) is provided with a plurality of receiving grooves (71) on the periphery thereof, each receiving groove (71) is provided with a foaming cylinder (11), a telescopic rod (111) of the foaming cylinder (11) is connected to the foaming movable plate (6), the lower mounting plate (7), the vertical plate (9), and the lower bottom plate (10) are fixed in sequence by bolts, the ejector plate (8) is located between the two vertical plates (9), an ejector rod (12) is fixed on the ejector plate (8), and the ejector rod (12) passes through the lower mounting plate (7) and the lower mold core (5) in sequence.

2. The injection foaming mold for a plastic plate according to claim 1, characterized in that: A threaded hole is formed at the upper end of the telescopic rod (111) of the foaming cylinder (11), and a plurality of limiting holes (64) are formed around the foaming movable plate (6). Limiting bolts (13) are passed through the limiting holes (64), and the lower ends of the limiting bolts (13) are connected to the threaded holes.

3. The injection foaming mold for a plastic plate according to claim 1, characterized in that: A flow distribution pipe (21) is fixed inside the flow channel plate (2); the inlet of the flow distribution pipe (21) is connected to an injection port (22) located on the upper top plate (1); the outlet of the flow distribution pipe (21) is connected to a plurality of injection heads (23) vertically penetrating the upper mounting plate (3); and the lower end of the injection head (23) is connected to a molding cavity (41) of the upper mold core (4).

4. The injection foaming mold for a plastic plate according to claim 1, characterized in that: The foaming movable plate (6) is provided with a step one (62), and the step one (62) abuts against the upper mold core (4).

5. The injection foaming mold for a plastic plate according to claim 1, characterized in that: The foaming movable plate (6) is provided with a second step (63), and the second step (63) abuts against the upper mounting plate (3).

6. The injection foaming mold for a plastic plate according to claim 1, characterized in that: A guide column (14) is fixed on the lower base plate (10), a guide hole (121) for the guide column (14) to pass through is opened on the top plate (8), and the upper end of the guide column (14) abuts against the lower mounting plate (7).

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