A temperature-adjustable injection mold capable of preventing stress marks

Abstract

The invention relates to the field of injection molding technology, in particular to a temperature-adjustable injection mold capable of preventing stress marks. The injection mold comprises a panel, an A plate, a B plate, an injection molding device, a supporting device, a mold, a cooling pipe, an ejector panel, an ejector bottom plate, a bottom plate, a baffle and a mold foot. When the injection mold is used, an injection molding machine is used to inject plastic material into the injection molding device, and the plastic material enters the mold through the injection molding device, and pressure is continuously applied to increase the density of the plastic. Then, cooling water is connected to the cooling pipe, and the water temperature at different thicknesses is controlled. The water temperature is used to adjust the cooling rate at various places, so that plastics of different thicknesses are cooled evenly to avoid the generation of stress marks. After cooling is completed, the B plate is pulled downward by the injection molding machine to separate the A plate and the B plate. After separation, the injection molding machine extends an ejector rod into the bottom plate, and the ejector bottom plate is pushed upward to eject the product out of the mold. After the product is taken out, the ejector rod is taken out and the injection mold is reset.

Description

Technical Field

[0001] The invention relates to the technical field of injection molding, in particular to a temperature-adjustable injection molding mold capable of preventing stress marks. Background Art

[0002] Injection molding, also known as injection molding, is a molding method that combines injection and molding. The advantages of the injection molding method are fast production speed, high efficiency, automated operation, a wide variety of colors, shapes from simple to complex, sizes from large to small, and precise product size. The product is easy to update and can be made into parts with complex shapes. Injection molding is suitable for mass production and molding processing fields such as products with complex shapes. The existing technology has defects: due to the overall structural requirements of plastic products, the thickness of the glue position is uneven. Since the thin wall of the plastic part is cooled from the outside to the inside during the cooling process, the cooling rate of the thin wall of the plastic part is inconsistent. The uncooled part will produce various stresses on the first cooled part, and the uneven cooling of various parts of the plastic part will cause stress marks in places too far away from the cooling water channel. The current improvement plan is to use wool felt to rub the product after the product is formed to reduce or eliminate stress marks, but it will produce a lot of dust and impurities, affecting the workshop environment. In addition, it is necessary to increase manpower to rub the product, resulting in increased company costs. Summary of the invention

[0003] The object of the present invention is to provide a temperature-adjustable injection mold capable of preventing stress marks, so as to solve the problems raised in the above-mentioned background technology.

[0004] In order to solve the above technical problems, the present invention provides the following technical solutions: the injection mold includes a base plate, a supporting structure is installed on the base plate, a mold foot is installed on the base plate, a baffle, an ejector base plate and an ejector panel are installed between two mold feet, the baffle is installed on the base plate, the ejector base plate is installed on the supporting structure, the ejector panel is installed above the ejector base plate, a B plate is installed above the mold foot, an A plate is installed above the B plate, a mold is installed in the groove of the A plate and the B plate, a cooling pipe is installed in the pipe groove of the A plate and the B plate, the cooling pipe is installed in the mold, a panel is installed above the A plate, an injection molding device is installed in the through groove of the panel and the A plate, and the injection molding device is installed on one side of the mold. When using the injection mold, plate A is fixed, and the injection molding machine moves plate B to a vertical position below plate B, and cooperates with plate A to complete the closing of the mold, forming an injection cavity between the female mold core and the male mold insert. After the mold is closed, the injection molding machine injects plastic material into the injection molding device, and the plastic material enters the injection cavity of the mold through the injection molding device. After the injection cavity is filled with plastic material, continue to inject plastic material into the injection molding pipe 81, apply pressure to the mold 10, replenish the volume of the plastic in the injection cavity that has decreased due to cooling shrinkage, increase the density of the plastic, and then connect cooling water to the cooling pipe, control the water temperature at different thicknesses, and use the water temperature to adjust the cooling rate at each place, so that plastics of different thicknesses are cooled evenly to avoid the generation of stress marks. After cooling is completed, the injection molding machine is used to pull plate B downward to separate plates A and B. After separation, the injection molding machine extends the ejector rod into the bottom plate, pushes the ejector bottom plate upward, and ejects the product out of the mold. After taking out the product, take out the ejector rod, and the injection molding machine lifts the bottom plate to reset the injection mold.

[0005] The B plate includes a plate body, which is installed between the B plate and the panel, the mold is installed in the groove of the plate body, the cooling pipe is installed in the pipe groove of the plate body, a radio frequency identification tag and a positioning block are installed in the installation groove on one side of the plate body, a fixing plate is installed on one side of the plate body, a part of the fixing plate is installed on one side of the A plate, and the radio frequency identification tag is connected to the control system. The fixing plate is used to lock the A plate and the B plate, the positioning block can realize the precise positioning of the A plate and the B plate, and the radio frequency identification tag can store product information and locate the position of the injection mold.

[0006] The injection molding device includes an injection molding pipeline, which is installed in the through grooves of the panel and the A plate, and a transport pipeline is connected below the injection molding pipeline, which is installed on one side of the mold. The injection molding machine injects plastic material into the injection molding pipeline and injects it into each mold through the transport pipeline.

[0007] The support structure includes a spring, a positioning column, a support column, a guide column and a column. One end of the spring is installed in the telescopic groove of the B plate, and the other end of the spring is installed on the ejector panel. One end of the column is installed in the A plate, and the other end of the column is installed in the ejector bottom plate. The column is installed in the middle of the spring. One end of the positioning column is installed in the B plate, and the other end of the positioning column is installed in the positioning groove of the ejector bottom plate. One end of the support column is installed on the bottom plate, and the other end of the support column is installed below the B plate. One end of the guide column is installed inside the bottom plate, and the other end of the guide column is installed inside the B plate. When demolding, the ejector bottom plate moves upward to compress the spring. When closing the mold, the spring stretches to reset the ejector bottom plate.

[0008] The mold includes a female mold core, which is installed in the groove of plate A, a pipeline fixing block is installed above the female mold core, a female mold insert is installed inside the female mold core, one end of the female mold insert is installed in the insert groove 1 inside plate A, a male mold core is installed below the female mold core, a male mold insert is installed between the female mold core and the male mold core, the male mold core is installed in the groove of plate B, the male mold insert is installed in the insert groove 2 of the male mold core, an ejector is installed on the ejector base plate, the other end of the ejector is installed in the male mold insert, an inclined groove and an injection port are provided on the male mold insert, an inclined top is installed in the inclined groove, the other end of the inclined top is installed on the ejector base plate, and the transport pipeline is installed in the injection port. When injecting plastic material, the plastic material enters the injection port through the transport pipeline and enters the mold through the injection port. When demolding, the ejector base plate drives the ejector and the inclined top to move upward to eject the product out of the mold.

[0009] The female mold core is provided with pipeline groove one, pipeline groove two and pipeline groove three, the male mold core is provided with pipeline groove four and pipeline groove five, and the male mold insert is provided with pipeline groove six.

[0010] The cooling pipeline includes a first pipeline, a second pipeline, a third pipeline and a fourth pipeline, wherein the first pipeline is installed in pipeline groove 1, the second pipeline is installed in pipeline groove 2 and pipeline groove 3, the third pipeline is installed in pipeline groove 6, and the fourth pipeline is installed in pipeline groove 4 and pipeline groove 5. During cooling, cooling water is connected to the first pipeline, the second pipeline, the third pipeline and the fourth pipeline, and the water temperature in different pipelines is controlled according to the different thickness of the product to adjust the cooling rate of each position of the product.

[0011] Compared with the prior art, the beneficial effects achieved by the present invention are:

[0012] The present invention adjusts the cooling water channel on the mold so that the cooling water channel is close to the area where stress marks are likely to be generated on the product, thereby ensuring more effective cooling near the glue inlet, where the glue position is thick, and where it is far away from the glue inlet. At the same time, different piping systems are used to apply different water temperatures to places of different thicknesses, so that places of different thicknesses are cooled evenly, thereby achieving the purpose of reducing or eliminating stress marks and avoiding environmental pollution caused by existing solutions. The present invention eliminates stress marks by optimizing the cooling process during the injection molding process, and there is no need to add additional processes after the product is formed, thereby reducing the company's labor costs, improving production efficiency, and making the production process more environmentally friendly. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0014] Figure 1 is a front view of the injection molding device of the present invention;

[0015] Figure 2 is a rear view of the injection molding device of the present invention;

[0016] Figure 3 is a cross-sectional view of AA of the present invention;

[0017] Figure 4 is a cross-sectional view of BB of the present invention;

[0018] Figure 5 is a three-dimensional diagram of plate B of the present invention;

[0019] Figure 6 is a schematic diagram of an injection molding device of the present invention;

[0020] Figure 7 is a schematic diagram of a support device of the present invention;

[0021] Figure 8 is an exploded view of the mold of the present invention;

[0022] Fig. 9 is a schematic diagram of a cooling pipeline of the present invention;

[0023] Fig.10 is a schematic diagram of a first pipeline of the present invention;

[0024] Fig.11 is a schematic diagram of a fourth pipeline of the present invention;

[0025] Fig.12Schematic diagram of the second pipeline and the third pipeline of the present invention.

[0026] In the figure: 1, panel; 2, A plate; 3, B plate; 31, plate body; 32, positioning block; 33, RFID tag; 34, fixing plate; 4, mold foot; 5, ejector panel; 6, ejector bottom plate; 7, bottom plate; 8, injection molding device; 81, injection molding pipeline; 82, transportation pipeline; 9, baffle; 10, mold; 101, female mold core; 1011, pipeline groove 1; 1012, pipeline groove 2; 1013, pipeline groove 3; 102, female mold insert; 103, male mold insert; 1 031, pipeline groove six; 104, male mold core; 1041, pipeline groove four; 1042, pipeline groove five; 105, inclined ejector; 106, ejector pin; 107, inclined groove; 108, injection port; 109, fixing block; 11, supporting structure; 111, spring; 112, positioning column; 113, supporting column; 114, guide column; 115, column; 12, cooling pipeline; 121, first pipeline; 122, second pipeline; 123, third pipeline; 124, fourth pipeline. DETAILED DESCRIPTION

[0027] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0028] See also Figure 1-Figure 12The present invention provides a technical solution: the injection mold includes a bottom plate 7, a supporting structure 11 is installed on the bottom plate 7, a mold foot 4 is installed on the bottom plate 7, a baffle 9, an ejector bottom plate 6 and an ejector panel 5 are installed between the two mold feet 4, the baffle 9 is installed on the bottom plate 7, the ejector bottom plate 6 is installed on the supporting structure 11, the ejector panel 5 is installed above the ejector bottom plate 6, a B plate 3 is installed above the mold foot 4, an A plate 2 is installed above the B plate 3, a mold 10 is installed in the grooves of the A plate 2 and the B plate 3, a cooling pipe 12 is installed in the pipe grooves of the A plate 2 and the B plate 3, the cooling pipe 12 is installed in the mold 10, a panel 1 is installed above the A plate 2, an injection molding device 8 is installed in the through grooves of the panel 1 and the A plate 2, and the injection molding device 8 is installed on one side of the mold 10. When using the injection mold, the A plate 2 is fixed, and the B plate 3 is moved to a vertical position below the B plate 3 by the injection molding machine, and cooperates with the A plate 2 to complete the closing of the mold 10, and an injection cavity is formed between the female mold core 101 and the male mold insert 103. The injection molding machine injects plastic material into the injection molding device 8, and the plastic material enters the injection cavity of the mold 10 through the injection molding device 8. After the injection cavity is filled with plastic material, continue to inject plastic material into the injection molding pipe 81, apply pressure to the mold 10, replenish the volume of the plastic in the injection cavity that has been reduced due to cooling and shrinkage, increase the density of the plastic, and then connect cooling water to the cooling pipe 12 to control the water temperature at different thicknesses. The water temperature is used to adjust the cooling rate at each place, so that plastics of different thicknesses are cooled evenly to avoid the generation of stress marks.

[0029] The B plate 3 includes a plate body 31, which is installed between the B plate 3 and the panel 1, the mold 10 is installed in the groove of the plate body 31, the cooling pipe 12 is installed in the pipe groove of the plate body 31, and a radio frequency identification tag 33 and a positioning block 32 are installed in the installation groove on one side of the plate body 31. A fixing plate 34 is installed on one side of the plate body 31, and a part of the fixing plate 34 is installed on one side of the A plate 2. The radio frequency identification tag 33 is connected to the control system. The fixing plate 34 is used to lock the A plate 2 and the B plate 3, the positioning block 32 can realize the precise positioning of the A plate 2 and the B plate 3, and the radio frequency identification tag 33 can store product information and locate the position of the injection mold.

[0030] The injection molding device 8 includes an injection molding pipe 81, which is installed in the through grooves of the panel 1 and the A plate 2. The lower part of the injection molding pipe 81 is connected to a transport pipe 82, which is installed on one side of the mold 10. The injection molding machine injects the plastic material into the injection molding pipe 81 and then injects it into each mold 10 through the transport pipe 82.

[0031] The mold 10 includes a female mold core 101, which is installed in the groove of the A plate 2. A pipeline fixing block 109 is installed above the female mold core 101. A female mold insert 102 is installed inside the female mold core 101. A pipeline groove 1011, a pipeline groove 2 1012 and a pipeline groove 3 1013 are provided on the female mold core 101. One end of the female mold insert 102 is installed in the insert groove 1 inside the A plate 2. A male mold core 104 is installed below the female mold core 101. A male mold insert 103 is installed between the female mold core 101 and the male mold core 104. The male mold core 104 is installed on the B plate 2. In the groove of the plate 3, the male mold core 104 is provided with a pipeline groove 4 1041 and a pipeline groove 5 1042, the male mold insert 103 is installed in the insert groove 2 of the male mold core 104, the male mold insert 103 is provided with a pipeline groove 6 1031, the ejector 106 is installed on the ejector base plate 6, the other end of the ejector 106 is installed in the male mold insert 103, the male mold insert 103 is provided with an inclined groove 107 and an injection port 108, the inclined groove 107 is installed with an inclined ejector 105, the other end of the inclined ejector 105 is installed on the ejector base plate 6, and the transport pipe 82 is installed in the injection port 108. When injecting plastic material, the plastic material enters the injection port 108 through the transport pipe 82, and enters the mold 10 through the injection port 108. When demolding, the ejector base plate 6 drives the ejector 106 and the inclined ejector 105 to move upward to eject the product from the mold 10.

[0032] The support structure 11 includes a spring 111, a positioning column 112, a support column 113, a guide column 114 and a column 115. One end of the spring 111 is installed in the telescopic groove of the B plate 3, and the other end of the spring 111 is installed on the ejector panel 5. One end of the column 115 is installed in the A plate 2, and the other end of the column 115 is installed on the ejector bottom plate 6. The column 115 is installed in the middle of the spring 111. One end of the positioning column 112 is installed in the B plate 3, and the other end of the positioning column 112 is installed in the positioning groove of the ejector bottom plate 6. One end of the support column 113 is installed on the bottom plate 7, and the other end of the support column 113 is installed below the B plate 3. One end of the guide column 114 is installed inside the bottom plate 7, and the other end of the guide column 114 is installed inside the B plate 3. When demoulding, the ejector bottom plate 6 moves upward to compress the spring 111. When closing the mold, the spring 111 stretches to reset the ejector bottom plate 6.

[0033] The cooling pipeline 12 includes a first pipeline 121, a second pipeline 122, a third pipeline 123 and a fourth pipeline 124. The first pipeline 121 is installed in the pipeline groove 1011, the second pipeline 122 is installed in the pipeline groove 2 1012 and the pipeline groove 3 1013, the third pipeline 123 is installed in the pipeline groove 6 1031, and the fourth pipeline 124 is installed in the pipeline groove 4 1041 and the pipeline groove 5 1042. During cooling, cooling water is connected to the first pipeline 121, the second pipeline 122, the third pipeline 123 and the fourth pipeline 124. According to the different thicknesses of the products, the water temperature in different pipelines is controlled to adjust the cooling rate of each position of the product.

[0034] Working principle of the present invention:

[0035] When the injection mold is used, the A plate 2 is fixed, and the B plate 3 is moved to a vertical position below the B plate 3 by the injection molding machine, and cooperates with the A plate 2 to complete the closing of the mold 10, and an injection cavity is formed between the female mold core 101 and the male mold insert 103. After the mold 10 is closed, the injection molding machine injects plastic material into the injection molding pipe 81, and the plastic material enters the transport pipe 82 through the injection molding pipe 81. The plastic material is sent to the injection port 108 of each mold 10 through the transport pipe 82, and enters the injection cavity of the mold 10 through the injection port 108. After the plastic material is filled, the pressure is maintained and the plastic material is continuously injected into the injection pipe 81 to apply pressure to the mold 10 to supplement the volume of the plastic in the injection cavity that is reduced due to cooling and shrinkage, so that the plastic material is compacted in the mold and the density of the plastic is increased. After the pressure is maintained, cooling water is connected to the first pipe 121, the second pipe 122, the third pipe 123 and the fourth pipe 124. According to the different thicknesses of the products, the water temperature in different pipes is controlled to adjust the cooling rate of each position of the product so that plastics of different thicknesses are cooled evenly to avoid the generation of stress marks.

[0036] After cooling is completed, the B plate 3 is pulled downward by the injection molding machine to separate the A plate 2 and the B plate 3. The cooled product remains on the male mold insert 103. The injection molding machine extends the ejector rod into the through hole of the bottom plate 7, and pushes the ejector bottom plate 6 upward to compress the spring 111. The ejector bottom plate 6 drives the ejector 106 and the inclined ejector 105 to move upward. With the cooperation of the ejector 106 and the inclined ejector 105, the product is ejected from the male mold insert 103. After taking out the product, the injection molding machine retracts the ejector rod from the through hole of the bottom plate 7, and the ejector bottom plate 6 slowly returns to its original position under the extension of the spring 111.

[0037] Although the embodiments of the present invention have been shown and described, it is to be understood that the above embodiments are illustrative and are not to be construed as limitations on the present invention. A person skilled in the art may change, modify, substitute and vary the above embodiments within the scope of the present invention without departing from the principles and purpose of the present invention.

Claims

1. A temperature-adjustable injection mold capable of preventing stress marks, characterized in that: The injection mold comprises a base plate (7), a support structure (11) is installed on the base plate (7), a mold foot (4) is installed on the base plate (7), a baffle plate (9), an ejector base plate (6) and an ejector panel (5) are installed between two mold feet (4), the baffle plate (9) is installed on the base plate (7), the ejector base plate (6) is installed on the support structure (11), the ejector panel (5) is installed above the ejector base plate (6), and a B plate (3) is installed above the mold foot (4). , an A plate (2) is installed above the B plate (3), a mold (10) is installed in the grooves of the A plate (2) and the B plate (3), a cooling pipe (12) is installed in the pipe grooves of the A plate (2) and the B plate (3), the cooling pipe (12) is installed in the mold (10), a panel (1) is installed above the A plate (2), an injection molding device (8) is installed in the through grooves of the panel (1) and the A plate (2), and the injection molding device (8) is installed on one side of the mold (10); The B plate (3) comprises a plate body (31), the plate body (31) is installed between the B plate (3) and the panel (1), the mold (10) is installed in a groove of the plate body (31), the cooling pipe (12) is installed in a pipe groove of the plate body (31), a radio frequency identification tag (33) and a positioning block (32) are installed in the installation groove on one side of the plate body (31), a fixing plate (34) is installed on one side of the plate body (31), and a portion of the fixing plate (34) is installed on one side of the A plate (2); The injection molding device (8) comprises an injection molding pipeline (81), wherein the injection molding pipeline (81) is installed in the through grooves of the panel (1) and the A plate (2), and a transport pipeline (82) is connected below the injection molding pipeline (81), and the transport pipeline (82) is installed on one side of the mold (10); The support structure (11) comprises a spring (111), a positioning column (112), a support column (113), a guide column (114) and a column (115); one end of the spring (111) is mounted in the telescopic groove of the B plate (3); the other end of the spring (111) is mounted on the ejector panel (5); one end of the column (115) is mounted in the A plate (2); the other end of the column (115) is mounted on the ejector bottom plate (6); and the column (115) is mounted on the ejector bottom plate (6). In the middle of the spring (111), one end of the positioning column (112) is installed in the B plate (3), the other end of the positioning column (112) is installed in the positioning groove of the ejector base plate (6), one end of the support column (113) is installed on the base plate (7), the other end of the support column (113) is installed below the B plate (3), one end of the guide column (114) is installed inside the base plate (7), and the other end of the guide column (114) is installed inside the B plate (3); The mold (10) comprises a female mold core (101), the female mold core (101) being mounted in a groove of a plate A (2), a pipe fixing block (109) being mounted above the female mold core (101), a female mold insert (102) being mounted inside the female mold core (101), one end of the female mold insert (102) being mounted in an insert groove 1 inside the plate A (2), a male mold core (104) being mounted below the female mold core (101), a male mold insert (103) being mounted between the female mold core (101) and the male mold core (104), and the male mold core (104) being mounted in a groove 103. 04) is installed in the groove of plate B (3), the male mold insert (103) is installed in the insert groove 2 of the male mold core (104), the ejector base plate (6) is installed with an ejector (106), the other end of the ejector (106) is installed in the male mold insert (103), the male mold insert (103) is provided with an inclined groove (107) and an injection port (108), the inclined groove (107) is installed with an inclined ejector (105), the other end of the inclined ejector (105) is installed on the ejector base plate (6), and the transport pipe (82) is installed in the injection port (108).

2. A temperature-adjustable injection mold capable of preventing stress marks according to claim 1, characterized in that: The female mold core (101) is provided with a pipeline groove one (1011), a pipeline groove two (1012) and a pipeline groove three (1013), the male mold core (104) is provided with a pipeline groove four (1041) and a pipeline groove five (1042), and the male mold insert (103) is provided with a pipeline groove six (1031).

3. A temperature-adjustable injection mold capable of preventing stress marks according to claim 2, characterized in that: The cooling pipe (12) comprises a first pipe (121), a second pipe (122), a third pipe (123) and a fourth pipe (124); the first pipe (121) is installed in pipe groove one (1011), the second pipe (122) is installed in pipe groove two (1012) and pipe groove three (1013), the third pipe (123) is installed in pipe groove six (1031), and the fourth pipe (124) is installed in pipe groove four (1041) and pipe groove five (1042).

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