Traceless injection mold for glass fiber reinforced polypropylene plastic table

Abstract

The utility model belongs to the technical field of molds, and relates to a traceless injection mold for a glass fiber reinforced polypropylene plastic table. The plastic table forming die comprises a plastic table forming lower die and a plastic table forming upper die. In the injection molding process, the plastic table molding lower mold and the plastic table molding upper mold are close to each other, so that the upper molding inner mold plate, the integrated molding lower mold frame and the embedded molding assembly are matched to form a complete cavity, and a molten material is injected into the pouring buffer mechanism through an injection molding pipe of the injection molding main plate; the pouring buffering mechanism buffers molten materials, the molten materials are prevented from sputtering at the injection molding contact position, a hidden pouring gate is adopted, the traceless injection molding effect is achieved, after injection molding is completed, mold opening is conducted, all-directional ejection is conducted on a molded plastic part through an ejection part, demolding is smooth, follow-up cleaning, maintenance and replacement can be conveniently conducted through an embedded molding assembly, and the production efficiency is improved. The overall use cost of the mold is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of molds and relates to a traceless injection mold for a glass fiber reinforced polypropylene plastic table. Background Art

[0002] As a table used for dining, plastic dining tables are characterized by being lightweight, easy to carry, long-lasting and durable. In the production of plastic dining tables, an injection mold is required to perform preliminary injection molding of the plastic dining table board before subsequent processing. During the injection molding process of existing plastic table injection molds, due to the large area of the table top plastic part to be molded, more molten material needs to be injected into the mold cavity. The direct impact of the molten material and the injection molding contact point is prone to splashing and welding protrusions, making it difficult to achieve the effect of seamless injection molding. The surface quality of the plastic table top is poor and requires secondary processing. Therefore, it is urgent to design a seamless injection mold for glass fiber reinforced polypropylene plastic tables that can overcome the above defects.

[0003] In order to overcome the shortcomings of the existing technology, people have proposed various solutions through continuous exploration. For example, a Chinese patent discloses a large-scale assembled plastic table injection mold [application number: 202122505759.3], which includes an injection lower mold and an injection upper mold. The injection lower mold is provided with an embedded groove, and the bottom of the injection upper mold is provided with a molding protrusion. During the injection molding process, the utility model brings the injection lower mold and the injection upper mold closer to each other, so that the molding protrusion and the embedded groove are synchronously approached. One end of the spacing-adjustable table leg molding component abuts and cooperates with the molding protrusion, and the other end abuts and cooperates with the embedded groove to form a complete mold. Summary of the Invention

[0004] The purpose of the utility model is to provide a seamless injection mold for a glass fiber reinforced polypropylene plastic table in order to solve the above problems.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A seamless injection mold for a glass fiber reinforced polypropylene plastic table comprises a plastic table molding lower mold and a plastic table molding upper mold; an injection mainboard is provided above the plastic table molding upper mold; an upper molding inner mold plate, an integrated molding lower mold frame and an embedded molding component are provided between the plastic table molding lower mold and the plastic table molding upper mold; an injection tube is provided below the injection mainboard and passes through the plastic table molding upper mold and the upper molding inner mold plate in sequence; a pouring buffer mechanism connected to the injection tube is provided in the integrated molding lower mold frame; and an ejector is provided below the plastic table molding lower mold.

[0007] In the above-mentioned seamless injection mold for the glass fiber reinforced polypropylene plastic table, the one-piece molding lower mold frame includes a middle lower mold plate and two side lower mold plates, the pouring buffer mechanism includes a sunken gate arranged in the middle lower mold plate, the bottom of the injection tube extends into the sunken gate, and the middle lower mold plate is provided with a plurality of buffer pouring side grooves connected to the sunken gate.

[0008] In the above-mentioned glass fiber reinforced polypropylene plastic table seamless injection mold, the embedded molding component includes an inner molding insert and an edge molding insert arranged between the upper molding inner template and the plastic table molding lower mold, and the inner molding insert and the edge molding insert are respectively abutted against the integrated molding lower mold frame.

[0009] In the aforementioned seamless injection mold for a glass fiber reinforced polypropylene plastic table, the inner molding insert comprises two inner molding panels, and the inner molding panels are located between the middle lower mold plate and the side lower mold plate.

[0010] In the above-mentioned glass fiber reinforced polypropylene plastic table seamless injection mold, the edge molding insert includes four inner wall molding strips and outer wall molding stops distributed in a rectangular array along the center point of the plastic table molding lower mold, and the inner wall molding strips are located between the integrated molding lower mold frame and the outer wall molding stop.

[0011] In the above-mentioned seamless injection mold for the glass fiber reinforced polypropylene plastic table, the inner side of the outer wall molding block seat has a table edge pattern molding portion.

[0012] In the above-mentioned glass fiber reinforced polypropylene plastic table seamless injection mold, the plastic table forming lower mold is provided with a limiting connecting slider, and the outer wall forming block is slidably matched with the limiting connecting slider.

[0013] In the above-mentioned glass fiber reinforced polypropylene plastic table seamless injection mold, four table corner molding inserts are also provided between the upper molding inner template and the plastic table molding lower mold. The inner side of the table corner molding insert is against the side lower template, and the outer side is opposite to the outer wall molding block.

[0014] In the above-mentioned glass fiber reinforced polypropylene plastic table seamless injection mold, the ejector includes an ejector fixing plate arranged below the plastic table molding lower mold, and the ejector fixing plate is provided with a plurality of straight ejector rods passing through the plastic table molding lower mold.

[0015] In the above-mentioned seamless injection mold of the glass fiber reinforced polypropylene plastic table, the ejection fixing plate is also provided with a nozzle flow control rod extending into the sunken gate. The nozzle flow control rod is conical, and the nozzle flow control rod is opposite to the injection tube and can make reciprocating linear motion along the direction close to or away from one end of the injection tube.

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

[0017] 1. During the injection molding process, the utility model brings the plastic table molding lower mold and the plastic table molding upper mold close to each other, so that the upper molding inner template, the integrated molding lower mold frame and the embedded molding component cooperate to form a complete cavity, and the molten material is injected into the pouring buffer mechanism through the injection tube of the injection molding main board. The pouring buffer mechanism buffers the molten material to avoid splashing of the molten material at the injection molding contact point. A hidden gate is used to achieve the effect of traceless injection molding. After the injection molding is completed, the mold is opened and the molded plastic part is ejected in all directions through the ejector. The demoulding is smooth, and the embedded molding component can be conveniently cleaned, repaired and replaced later, reducing the overall cost of the mold.

[0018] 2. During the injection molding process, the utility model can control the molten material at the nozzle of the injection molding pipe by moving the nozzle flow control rod up and down to avoid splashing caused by excessive material flow. The bottom of the nozzle flow control rod is independently controlled by the cylinder.

[0019] Other advantages, objectives and features of the present invention will be reflected in part through the following description, and in part will be understood by those skilled in the art through research and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural diagram of the present utility model.

[0021] Figure 2 It is a partial structural diagram of the utility model.

[0022] Figure 3 It is a partial structural diagram of the utility model in another direction.

[0023] Figure 4 It is a partial structural diagram of the utility model in another direction.

[0024] In the figure: plastic table molding lower mold 1, plastic table molding upper mold 2, injection molding main board 3, upper molding inner template 4, integrated molding lower mold frame 5, embedded molding component 6, injection molding tube 7, pouring buffer mechanism 8, ejector 9, middle lower template 10, side lower template 11, sunken gate 12, buffer pouring side groove 13, inner molding insert 14, edge molding insert 15, inner molding panel 16, inner wall molding strip 17, outer wall molding block 18, table edge pattern molding part 19, limit connecting slider 20, table corner molding insert 21, ejection fixing plate 22, straight ejector rod 23, nozzle flow control plug rod 24. DETAILED DESCRIPTION

[0025] The present invention will be further described below with reference to the accompanying drawings.

[0026] like Figure 1-4 As shown, a seamless injection mold for a glass fiber reinforced polypropylene plastic table comprises a plastic table molding lower mold 1 and a plastic table molding upper mold 2, an injection mainboard 3 is provided above the plastic table molding upper mold 2, an upper molding inner mold plate 4, an integrated molding lower mold frame 5 and an embedded molding component 6 are provided between the plastic table molding lower mold 1 and the plastic table molding upper mold 2, an injection tube 7 is provided below the injection mainboard 3 and passes through the plastic table molding upper mold 2 and the upper molding inner mold plate 4 in sequence, a pouring buffer mechanism 8 connected to the injection tube 7 is provided in the integrated molding lower mold frame 5, and an ejector 9 is provided below the plastic table molding lower mold 1.

[0027] In this embodiment, during the injection molding process, the plastic table molding lower mold 1 and the plastic table molding upper mold 2 are brought close to each other, so that the upper molding inner template 4, the integrated molding lower mold frame 5 and the embedded molding component 6 cooperate to form a complete cavity, and the molten material is injected into the pouring buffer mechanism 8 through the injection tube 7 of the injection molding main board 3. The pouring buffer mechanism 8 buffers the molten material to avoid splashing of the molten material at the injection molding contact point. A hidden gate is used to achieve the effect of traceless injection molding. After the injection molding is completed, the mold is opened, and the molded plastic part is ejected in all directions through the ejector 9, and the demolding is smooth. The embedded molding component 6 can be conveniently cleaned, repaired and replaced later, thereby reducing the overall cost of using the mold.

[0028] Combine Figure 1-4 As shown, the one-piece molding lower mold frame 5 includes a middle lower mold plate 10 and two side lower mold plates 11, the pouring buffer mechanism 8 includes a sunken gate 12 arranged in the middle lower mold plate 10, the bottom of the injection tube 7 extends into the sunken gate 12, and the middle lower mold plate 10 is provided with a plurality of buffer pouring side grooves 13 connected to the sunken gate 12.

[0029] Specifically, a middle lower template 10 and two side lower templates 11 are fixedly connected to the plastic table molding lower mold 1, which is convenient for positioning the embedded molding component 6. During injection molding, the molten material is injected into the sunken gate 12 through the injection tube 7 of the injection molding main board 3. A hidden gate is used to achieve the effect of traceless injection molding. The molten material is then diverted through the buffering side groove 13 for injection molding to buffer the molten material and avoid splashing of the molten material at the injection contact point.

[0030] Combine Figure 3 、 Figure 4 As shown, the embedded molding component 6 includes an inner molding insert 14 and an edge molding insert 15 arranged between the upper molding inner template 4 and the plastic table molding lower mold 1, and the inner molding insert 14 and the edge molding insert 15 are respectively abutted against the integrated molding lower mold frame 5.

[0031] In this embodiment, the inner molding insert 14 and the edge molding insert 15 are used to assist in molding the plastic part.

[0032] The inner molding insert 14 includes two inner molding panels 16 . The inner molding panels 16 are located between the middle lower mold plate 10 and the side lower mold plates 11 .

[0033] In this embodiment, the inner molding panel 16 is used to assist in molding the plastic part.

[0034] Combine Figure 3-4 As shown, the edge molding insert 15 includes four inner wall molding strips 17 and outer wall molding blocks 18 distributed in a rectangular array along the center point of the plastic table molding lower mold 1. The inner wall molding strips 17 are located between the integrated molding lower mold frame 5 and the outer wall molding block 18. The inner side of the outer wall molding block 18 has a table edge pattern molding portion 19. Four table corner molding inserts 21 are also provided between the upper molding inner template 4 and the plastic table molding lower mold 1. The inner side of the table corner molding insert 21 is against the side lower template 11, and the outer side is opposite to the outer wall molding block 18.

[0035] In this embodiment, the inner wall molding insert 17 and the outer wall molding block 18 cooperate to assist in molding the table edge and table wall of the plastic part, the table corner molding insert 21 is used to assist in molding the table corner structure, and the table edge pattern molding part 19 is used to mold the pattern on the outer wall of the table edge. No secondary processing is required, shortening the processing process.

[0036] The plastic table forming lower mold 1 is provided with a limiting connecting slider 20 , and the outer wall forming stopper 18 is slidably matched with the limiting connecting slider 20 .

[0037] In this embodiment, when the mold is opened, the outer wall forming stopper 18 can slide along the limiting connecting slider 20, making it more convenient to take out the plastic part.

[0038] Combine Figure 1-4 As shown, the ejector 9 includes an ejector fixing plate 22 arranged below the plastic table forming lower mold 1, and the ejector fixing plate 22 is provided with a plurality of straight ejector rods 23 passing through the plastic table forming lower mold 1.

[0039] In this embodiment, the ejector fixing plate 22 is used to fix the straight ejector rod 23. After the injection molding is completed, the ejector fixing plate 22 is moved upward, which can simultaneously drive the straight ejector rod 23 to move upward to eject the molded plastic part.

[0040] Combine Figure 2 As shown, the ejector fixing plate 22 is further provided with a nozzle flow control rod 24 extending into the sunken gate 12. The nozzle flow control rod 24 is conical and faces the injection tube 7 and can make reciprocating linear motion along one end of the injection tube 7 or away from the injection tube 7.

[0041] In this embodiment, during the injection molding process, the molten material at the nozzle of the injection tube 7 can be controlled by moving the nozzle flow control rod 24 up and down to avoid splashing caused by excessive material flow. The bottom of the nozzle flow control rod 24 is independently controlled by a cylinder (the cylinder is not shown in the figure).

[0042] The working principle of this utility model is:

[0043] During the injection molding process, the plastic table molding lower mold 1 and the plastic table molding upper mold 2 are brought close to each other, so that the upper molding inner template 4, the integrated molding lower mold frame 5 and the embedded molding component 6 cooperate to form a complete mold cavity, and the molten material is injected into the sunken gate 12 through the injection tube 7 of the injection molding main board 3. A hidden gate is used to achieve the effect of traceless injection molding. The molten material is then diverted through the buffering side groove 13 for injection molding to buffer the molten material and avoid splashing of the molten material at the injection molding contact point. The inner molding panel 16 is used to assist in molding the plastic part, the inner wall molding strip 17 and the outer wall molding stopper 18 cooperate to assist in molding the table edge and table wall of the plastic part, the table corner molding insert 21 is used to assist in molding the table corner structure, and the table edge grain molding part 19 is used to mold the grain at the outer wall of the table edge. No secondary processing is required, which shortens the processing process. When opening the mold, the outer wall molding stopper 18 can slide along the limit connecting slider 20, which is more convenient for taking out the plastic part.

[0044] The ejector fixing plate 22 is used to fix the straight ejector rod 23. After the injection molding is completed, the ejector fixing plate 22 is moved upward, which can simultaneously drive the straight ejector rod 23 to move upward, and the molded plastic part is ejected from the mold.

[0045] During the injection molding process, the molten material at the nozzle of the injection molding tube 7 can be controlled by moving the nozzle flow control rod 24 up and down to avoid splashing caused by excessive material flow. The bottom of the nozzle flow control rod 24 is independently controlled by the cylinder.

[0046] 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 with similar methods, without departing from the spirit of the present invention.

[0047] Although this article frequently uses terms such as plastic table molding lower mold 1, plastic table molding upper mold 2, injection molding main board 3, upper molding inner mold plate 4, integrated molding lower mold frame 5, embedded molding component 6, injection molding tube 7, pouring buffer mechanism 8, ejector 9, middle lower mold plate 10, side lower mold plate 11, sunken gate 12, pouring buffer side groove 13, inner molding insert 14, edge molding insert 15, inner molding panel 16, inner wall molding strip 17, outer wall molding stopper 18, table edge pattern molding portion 19, position limiting connecting slider 20, table corner molding insert 21, ejection fixing plate 22, straight ejector rod 23, nozzle flow control plug rod 24, etc., it does not exclude the possibility of using other terms. The use of these terms is only for the purpose of more conveniently describing and explaining the essence of the utility model. Interpreting them as any additional restrictions is contrary to the spirit of the utility model.

Claims

1. A glass fiber reinforced polypropylene plastic table seamless injection mold, comprising a plastic table molding lower mold (1) and a plastic table molding upper mold (2), characterized in that: An injection molding main board (3) is provided above the plastic table molding upper mold (2); an upper molding inner mold plate (4), an integrated molding lower mold frame (5) and an embedded molding component (6) are provided between the plastic table molding lower mold (1) and the plastic table molding upper mold (2); an injection molding tube (7) is provided below the injection molding main board (3) and passes through the plastic table molding upper mold (2) and the upper molding inner mold plate (4) in sequence; a pouring buffer mechanism (8) connected to the injection molding tube (7) is provided inside the integrated molding lower mold frame (5); and an ejector (9) is provided below the plastic table molding lower mold (1).

2. The seamless injection mold for a glass fiber reinforced polypropylene plastic table according to claim 1, characterized in that: The one-piece molding lower mold frame (5) includes a middle lower mold plate (10) and two side lower mold plates (11); the pouring buffer mechanism (8) includes a sunken gate (12) arranged in the middle lower mold plate (10); the bottom of the injection tube (7) extends into the sunken gate (12); and the middle lower mold plate (10) is provided with a plurality of buffer pouring side grooves (13) connected to the sunken gate (12).

3. The seamless injection mold for a glass fiber reinforced polypropylene plastic table according to claim 2, characterized in that: The embedded molding component (6) comprises an inner molding insert (14) and an edge molding insert (15) arranged between the upper molding inner template (4) and the plastic table molding lower mold (1), and the inner molding insert (14) and the edge molding insert (15) are respectively in contact with the integrated molding lower mold frame (5).

4. The seamless injection mold for a glass fiber reinforced polypropylene plastic table according to claim 3, characterized in that: The inner molding insert (14) comprises two inner molding panels (16), and the inner molding panels (16) are located between the middle lower mold plate (10) and the side lower mold plate (11).

5. The seamless injection mold for a glass fiber reinforced polypropylene plastic table according to claim 4, characterized in that: The edge molding insert (15) comprises four inner wall molding strips (17) and outer wall molding blocks (18) distributed in a rectangular array along the center point of the plastic table molding lower mold (1), and the inner wall molding strips (17) are located between the integrated molding lower mold frame (5) and the outer wall molding blocks (18).

6. The seamless injection mold for a glass fiber reinforced polypropylene plastic table according to claim 5, characterized in that: The inner side of the outer wall forming block seat (18) is provided with a table edge pattern forming portion (19).

7. The seamless injection mold for a glass fiber reinforced polypropylene plastic table according to claim 6, characterized in that: The plastic table forming lower die (1) is provided with a position-limiting connecting slide block (20), and the outer wall forming stopper (18) is slidably matched with the position-limiting connecting slide block (20).

8. The seamless injection mold for a glass fiber reinforced polypropylene plastic table according to claim 7, characterized in that: Four table corner forming inserts (21) are further provided between the upper forming inner template (4) and the plastic table forming lower template (1). The inner sides of the table corner forming inserts (21) abut against the side lower template (11), and the outer sides are opposite to the outer wall forming block (18).

9. The seamless injection mold for a glass fiber reinforced polypropylene plastic table according to claim 8, characterized in that: The ejector (9) comprises an ejector fixing plate (22) arranged below the plastic table forming lower mold (1), and the ejector fixing plate (22) is provided with a plurality of straight ejector rods (23) passing through the plastic table forming lower mold (1).

10. The seamless injection mold for a glass fiber reinforced polypropylene plastic table according to claim 9, characterized in that: The ejection fixing plate (22) is also provided with a nozzle flow control rod (24) extending into the sunken gate (12); the nozzle flow control rod (24) is tapered, and the nozzle flow control rod (24) is directly opposite to the injection tube (7) and can perform reciprocating linear motion along one end of the injection tube (7) or away from the injection tube (7).

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