Injection molding device for full-transparent injection molding product and automatic material head cutting

Abstract

The invention relates to the technical field of injection molding, in particular to an injection molding device for full-transparent injection molding products and automatic material head cutting, comprising: a female mold, the lower end of which is attached to a male mold; the driving piece is connected with the side end of the male mold; the two fixing plates are symmetrically mounted in the male mold; the two bottom plates are attached to the upper ends of the two fixing plates correspondingly, and a movable part of the driving part penetrates through the two fixing plates and is connected with the two bottom plates correspondingly; the two panels are respectively mounted at the upper ends of the two bottom plates; the two cutters are respectively mounted at the upper ends of the two bottom plates, and the cutters penetrate through the panel and extend to the upper end of the male mold; and the two auxiliary parts are slidably connected into the two cutters correspondingly, through the design, the material head on the female mold is automatically cut off, the probability that injection molding products are damaged and the like is effectively reduced, the working time is effectively shortened, and the injection molding effect and quality are effectively guaranteed.

Description

Technical Field

[0001] This invention relates to an injection molding device for producing fully transparent injection molded products with an automatic cutting head, belonging to the field of injection molding technology. Background Technology

[0002] Injection molding, as a mainstream process for industrial product shaping and manufacturing, mainly covers two major areas: rubber injection molding and plastic injection molding. Based on differences in molding methods, it can be further subdivided into injection molding compression molding and die casting. Among these, the injection molding machine, as the core equipment, can quickly and efficiently produce various complex-shaped plastic products from thermoplastic or thermosetting materials using matching plastic molds. This process is known for its short production cycle and high degree of automation, making it particularly suitable for large-scale mass production.

[0003] The plastic molds used for fully transparent injection molded products are of a special type. To ensure the surface quality of the product, an integral ejection module design is usually adopted to reduce the impact of ejection marks on transparency. However, the existing process still has significant drawbacks: after injection molding, the molded part retains a piece of plastic residue. When opening the mold and removing the part, the residue is often removed together with the part in a connected state. This requires subsequent removal using specialized tools, and during this process, the connection between the residue and the part is highly susceptible to damage from external forces. This not only increases the defect rate and prolongs the production cycle but also directly affects the final product's molding quality and injection molding effect. Summary of the Invention

[0004] To address the problems in the prior art, the present invention provides an injection molding device for producing fully transparent injection molded products and automatically cutting the material head.

[0005] The technical solution adopted by this invention to solve its technical problem is:

[0006] An injection molding device for producing fully transparent injection molded products and automatically cutting the material head includes:

[0007] The female mold, the lower end of which is fitted with the male mold;

[0008] A material conveying component is connected to the upper end of the female mold, and the material conveying component penetrates the female mold;

[0009] A driving component is connected to the side end of the male mold, and the driving component extends into the male mold;

[0010] The fixing plate is provided in two, and the two fixing plates are symmetrically installed in the male mold, and both fixing plates are located at the upper end of the driving component;

[0011] The base plate is provided in two parts, and the two base plates are respectively attached to the upper ends of two fixed plates. The movable part of the driving component passes through the two fixed plates and is connected to the two base plates respectively.

[0012] The panel has two panels, which are respectively mounted on the upper part of two base plates. Two cavities are opened in the mold, and the cavities are located on the upper part of the fixed plate. The base plate and the panel are movably arranged inside the cavity.

[0013] The cutter is provided in two parts, which are respectively mounted on the upper part of the two base plates. The cutter penetrates the panel and extends to the upper part of the mold, and is located directly below the outlet of the material conveyor.

[0014] The auxiliary component has two parts, which are slidably connected to the two cutters respectively. The lower end of the auxiliary component passes through the cutter and the fixing plate and extends into the mold, and the auxiliary component is located outside the drive component.

[0015] Furthermore, the driving component includes a conveying pipeline, which is installed on the side end of the mold and extends into the mold. Two pushing mechanisms are symmetrically connected and installed at the upper end of the conveying pipeline. The two pushing mechanisms are respectively movably arranged at the lower ends of two fixed plates, and the moving parts of the pushing mechanisms pass through the fixed plates and are connected to the base plate.

[0016] Furthermore, the pushing mechanism includes two hydraulic cylinders, both of which are connected and disposed at the upper end of the conveying pipeline. A return component is installed on the upper end of the movable part of each of the two hydraulic cylinders. The return component is movably disposed at the lower end of the fixed plate and passes through the fixed plate and is connected to the base plate.

[0017] Furthermore, the return assembly includes a transmission rod with an inverted T-shaped cross-section. The transmission rod is disposed on the upper end of the movable part of the hydraulic cylinder. The vertical part of the transmission rod is movably mounted on the lower end of the fixed plate and passes through the fixed plate and is connected to the base plate. A first elastic element is disposed between the upper end of the horizontal part of the transmission rod and the lower end of the fixed plate, and the first elastic element is located outside the vertical part of the transmission rod.

[0018] Furthermore, the auxiliary component includes a sealing plate, which is slidably connected inside the cutter. The lower end of the sealing plate passes through the fixing plate and the bottom plate and extends into the mold. The sealing plate is located on the inner side of the hydraulic cylinder. The upper surface of the sealing plate is recessed downward to form a conical groove. A suction tube is provided at the lower end of the sealing plate, and the suction tube passes through the sealing plate and is arranged in communication with the conical groove. A conical column is fitted inside the conical groove, and the conical column extends out of the upper side of the conical groove. Two connecting rods are symmetrically installed on the outer end of the conical column, and the other end of the two connecting rods is connected to the inner wall of the cutter. The lower end of the suction tube is connected to the extraction mechanism.

[0019] Furthermore, the extraction mechanism includes a plug, which is disposed at the lower end of the suction tube and passes through the plug. The lower end of the plug is threadedly connected to an outer cylinder and extends into the outer cylinder. The lower end of the outer cylinder is connected to an extraction device, which is disposed within a mold. A straight cylinder is installed at the lower end of the plug and is connected to the suction tube. The lower end of the straight cylinder is threadedly connected to a filter bag and extends into the filter bag. The straight cylinder is connected to the filter bag.

[0020] Furthermore, the material feeding component includes an injection port, which is located at the upper end of the master mold and extends into the master mold. Two flow channels are symmetrically installed inside the master mold and extend to the lower end of the master mold. The upper ends of the two flow channels are connected to the injection port, and the outlets of the two flow channels are located directly above the two cutters. The upper end of the cutter is larger than the outlet of the flow channel.

[0021] Furthermore, the upper end of the panel is recessed downward to form multiple mounting grooves, and the mounting grooves are located outside the cutter. Each of the multiple mounting grooves is provided with a second elastic member, and the second elastic member extends out of the upper side of the mounting groove and connects to the top of the cavity.

[0022] The beneficial effects of this invention are:

[0023] After the raw material melt solidifies and is pressed, high-pressure oil is delivered into the oil cylinder through the delivery pipeline, which causes the moving part of the oil cylinder to move upward synchronously. This causes the transmission rod to move upward, and the base plate and cutter to move upward. The cutter then penetrates the molded part and contacts the lower end of the outlet of the runner, thereby separating the molded part from the sprue. This achieves automatic cutting of the sprue on the master mold, effectively reducing the probability of damage to the injection molded product, effectively reducing working time, and effectively ensuring the injection molding effect and quality. Attached Figure Description

[0024] Other features, objects, and advantages of the invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0025] Figure 1 This is a schematic diagram of the structure of an injection molding device for a fully transparent injection molded product with an automatic cutting head, according to the present invention.

[0026] Figure 2 This is a cross-sectional view of an injection molding device for a fully transparent injection molded product with an automatic cutting head, according to the present invention.

[0027] Figure 3 for Figure 2 Enlarged view of section A in the middle;

[0028] Figure 4 This is an assembly diagram of the conveying pipeline and hydraulic cylinder in an injection molding device for a fully transparent injection molded product with an automatic cutting head, according to the present invention.

[0029] Figure 5 This is an assembly diagram of the hydraulic cylinder, transmission rod, first elastic element, fixing plate, base plate, panel and cutter in an injection molding device for a fully transparent injection molded product with an automatic cutting head according to the present invention.

[0030] Figure 6 for Figure 5 A sectional view along the BB direction;

[0031] Figure 7 for Figure 6 Enlarged view of section C;

[0032] Figure 8 This is a perspective view of the cutter in an injection molding device for a fully transparent injection molded product with an automatic cutting head, according to the present invention.

[0033] In the diagram: 1. Female mold, 11. Injection port, 12. Runner, 2. Male mold, 3. Conveying pipeline, 31. Hydraulic cylinder, 4. Transmission rod, 5. First elastic element, 6. Fixing plate, 7. Base plate;

[0034] 8. Panel, 81. Second elastic element, 9. Cutter, 91. Sealing plate, 92. Straw, 921. Conical column, 922. Connecting rod, 93. Plug, 94. Outer cylinder, 95. Fan, 96. Filter bag, 97. Straight cylinder. Detailed Implementation

[0035] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0036] Example 1: As Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 and Figure 8 As shown, an injection molding device for a fully transparent injection molded product with automatic cutting head is provided, including: a female mold 1, a male mold 2 attached to the lower end of the female mold 1, the female mold 1 and the male mold 2 are used together for injection molding, and an injection port 11 extending into the female mold 1 is provided on the upper end of the female mold 1 for injecting molten plastic through the injection port 11. Two flow channels 12 symmetrically installed in the female mold 1 and extending to the lower end of the female mold 1 are arranged with their upper ends connected to the injection port 11. The two flow channels 12 are used together to deliver molten plastic into the two molding cavities formed by the closing of the female mold 1 and the male mold 2.

[0037] A conveying pipe 3 extending into the male mold 2 is installed on the side end of the male mold 2. The conveying pipe 3 is used to convey oil. Four oil cylinders 31 are connected and installed on the upper end of the conveying pipe 3. The oil cylinders 31 drive the corresponding transmission rods 4 to move upward. The four transmission rods 4 with inverted T-shaped cross sections are respectively set on the upper end of the movable part of the four oil cylinders 31. The vertical parts of two transmission rods 4 are movably installed on the lower end of the two fixed plates 6 symmetrically installed in the male mold 2. The vertical parts of the transmission rods 4 penetrate the fixed plates 6 and are connected to the base plate 7. The transmission rods 4 push the base plate 7 to move. The first elastic member 5 located on the outside of the vertical part of the transmission rod 4 is set between the upper end of the horizontal part of the transmission rod 4 and the lower end of the fixed plate 6. The first elastic member 5 makes the transmission rod 4 return to its original position.

[0038] Two base plates 7 are respectively attached to the upper ends of two fixed plates 6. The base plates 7 provide a mounting carrier for the cutter 9. Two panels 8 are respectively installed on the upper ends of the two base plates 7. The panels 8 provide a processing carrier for the mounting groove. Two cavities located on the upper ends of the fixed plates 6 are opened in the male mold 2. The base plates 7 and panels 8 are movably arranged inside the cavities. The cavities provide a space for the base plates 7 and panels 8 to move. Two cutters 9 that penetrate the panels 8 and extend to the upper end of the male mold 2, with the upper end size larger than the outlet size of the flow channel 12, are respectively installed on the upper ends of the two base plates 7. The outlets of the two flow channels 12 are respectively located directly above the two cutters 9. The cutters 9 are used for cutting the material head.

[0039] Multiple mounting grooves are recessed downwards on the upper surface of the panel 8 to form a mounting groove on the outside of the cutter 9. The mounting grooves provide mounting space for the second elastic element 81. Multiple second elastic elements 81 extending out of the upper side of the mounting groove and connected to the top of the cavity are respectively placed in the multiple mounting grooves. The multiple second elastic elements 81 work together to return the base plate 7, panel 8 and cutter 9 to their original positions. Two sealing plates 91 with their lower ends penetrating through the fixing plate 6 and base plate 7 and extending into the male mold 2 and located on the inner side of the oil cylinder 31 are slidably connected to the two cutters 9. The sealing plates 91 seal the inner cavity of the cutter 9.

[0040] In use, the male mold 2 and the female mold 1 are first closed, and then the raw material melt is delivered into the injection port 11. The raw material melt in the injection port 11 is then diverted into two runners 12, and the raw material melt is delivered to the two molding cavities formed by the male mold 2 and the female mold 1 through the two runners 12. The raw material melt is then solidified and molded in the molding cavity to form a fully transparent injection molded product.

[0041] After the raw material melt is solidified and pressed, high-pressure oil is simultaneously supplied to the four hydraulic cylinders 31 through the conveying pipeline 3. This causes the moving parts of the four hydraulic cylinders 31 to move upward synchronously, which in turn causes the four transmission rods 4 to move upward synchronously. This compresses the four first elastic elements 5, causing the first elastic elements 5 to generate elastic force. At the same time, the upward movement of the transmission rods 4 causes the base plate 7 to move upward, which in turn causes the cutter 9 to move upward. This causes the cutter 9 to penetrate the molded part and contact the lower end of the outlet of the runner 12, thereby separating the molded part from the sprue. This achieves automatic cutting of the sprue on the master mold 1, effectively reducing the probability of damage to the injection molded product, effectively reducing working time, and effectively ensuring the injection molding effect and quality.

[0042] At the same time, the upward movement of the base plate 7 will cause the panel 8 to move upward synchronously, thereby compressing multiple second elastic elements 81 and causing the second elastic elements 81 to generate elastic force. When the panel 8 moves upward and contacts the top of the cavity, the cutter 9 stops moving, effectively avoiding excessive extrusion between the cutter 9 and the mold 1, effectively reducing the probability of damage to the cutter 9 and the mold 1, and effectively ensuring the injection molding effect and quality.

[0043] After the injection-molded product solidifies and cools, the oil is drained from the four cylinders 31 through the conveying pipe 3. Then, under the elastic force of the first elastic element 5, the transmission rod 4 moves down to its original position. With the assistance of the elastic force of multiple second elastic elements 81, the base plate 7, the panel 8, and the cutter 9 move down. Simultaneously, under the obstruction of the fixed plate 6, the base plate 7, the panel 8, and the cutter 9 return to their original positions, effectively ensuring that normal cutting of the material head can be performed subsequently. Then, the mold opening operation is performed, and the molded fully transparent injection-molded product is ejected using the integral ejector module designed on the male mold 2, so that there are no ejection marks on the fully transparent injection-molded product. Then, the fully transparent injection-molded product is removed, and the cut material head is cleaned up. Then, the injection molding operation is repeated.

[0044] Example 2: Figure 2 , Figure 3 , Figure 6 , Figure 7 and Figure 8 As shown, a conical groove is formed by a downward indentation on the upper end of the sealing plate 91. A suction tube 92, which passes through the plug 93, is placed on the lower end of the sealing plate 91. The suction tube 92 passes through the sealing plate 91 and is arranged in communication with the conical groove. The conical groove and the suction tube 92 are used to collect the material chips generated by the cutting head. A conical column 921 extending from the upper side of the conical groove is attached to the conical groove. The conical groove is sealed by the conical column 921. Two connecting rods 922, whose other ends are connected to the inner wall of the cutter 9, are symmetrically installed on the outer end of the conical column 921. The two connecting rods 922 are used to connect the conical column 921 and the cutter 9.

[0045] A plug 93 extending into the outer cylinder 94 is placed at the lower end of the suction tube 92. The plug 93 seals the opening of the outer cylinder 94 and provides a mounting carrier for the straight cylinder 97. The outer cylinder 94 is threaded to the lower end of the plug 93. The outer cylinder 94 provides working space for the filter bag 96. The extraction device, which is set in the male mold 2, is connected and installed at the lower end of the outer cylinder 94. The extraction device is used to provide extraction force. The extraction device can be a fan 95. The straight cylinder 97, which is connected to the suction tube 92 and extends into the filter bag 96, is installed at the lower end of the plug 93. The straight cylinder 97 provides a mounting carrier for the filter bag 96. The filter bag 96, which is connected to the straight cylinder 97, is threaded to the lower end of the straight cylinder 97. The filter bag 96 is used to collect material debris.

[0046] In use, the male mold 2 and the female mold 1 are first closed. Then, the raw material melt is transported along the injection port 11 and the two runners 12 to the two molding cavities formed by the male mold 2 and the female mold 1. The raw material melt is then solidified in the molding cavity to form a fully transparent injection molded product. After the raw material melt is solidified and pressed, the cutter 9 is moved upward and penetrates the molded product through the conveying pipe 3, the oil cylinder 31, the transmission rod 4 and the base plate 7, and contacts the lower end of the outlet of the runner 12, thereby separating the molded product from the material head.

[0047] During the upward movement of the cutter 9, the connecting rod 922 moves upward, which in turn moves the conical column 921 upward, causing the conical column 921 to separate from the conical groove. When the cutter 9 contacts the lower end of the outlet of the flow channel 12, the fan 95 is activated to perform air extraction into the outer cylinder 94, thereby creating a negative pressure inside the outer cylinder 94. Under the action of negative pressure, the material chips generated by the cutting head are extracted, allowing the material chips to enter the filter bag 96 along the conical groove and the suction pipe 92. This effectively reduces the probability of defects in subsequent injection molded products due to material chip residue and other factors, effectively ensuring the injection molding effect and quality.

[0048] After the injection-molded product solidifies and cools, the oil is drained from the four cylinders 31 using the conveying pipeline 3. Then, with the assistance of the first elastic element 5, the second elastic element 81, and the fixed plate 6, the transmission rod 4, the base plate 7, the panel 8, and the cutter 9 are moved down to their original positions. The downward movement of the cutter 9 causes the connecting rod 922 and the conical column 921 to move down, thereby causing the conical column 921 to re-insert into the conical groove, thus sealing the conical groove. This effectively prevents the raw material melt from entering the conical groove during injection, effectively reducing the probability of blockage in the suction pipe 92, and ensuring normal material chip extraction and collection operations, thus effectively guaranteeing the injection molding effect and quality.

[0049] Although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A injection molding device for full transparent injection molding product and automatic cutting off the material head, characterized in that, Include: The female die (1) is matched with the male die (2) at the lower end; The material conveying part is connected with the upper end of the female die (1), and the material conveying part penetrates the female die (1); The driving part is connected with the side end of the male die (2), and the driving part extends into the male die (2); The fixed plate (6) is provided with two, two fixed plates (6) are symmetrically installed in the male die (2), and two fixed plates (6) are located at the upper end of the driving part; The bottom plate (7) is provided with two, two bottom plates (7) are respectively matched with the upper end of two fixed plates (6), the movable part of the driving part penetrates two fixed plates (6) and is respectively connected with two bottom plates (7); The face plate (8) is provided with two, two face plates (8) are respectively installed at the upper end of two bottom plates (7), two cavities are formed in the male die (2), and the cavities are located at the upper end of the fixed plate (6), the bottom plate (7) and the face plate (8) are movably arranged in the cavity; The cutter (9) is provided with two, two cutters (9) are respectively installed at the upper end of two bottom plates (7), the cutter (9) penetrates the face plate (8) and extends to the upper end of the male die (2), and the cutter (9) is located directly below the outlet of the material conveying part; The auxiliary part is provided with two, two auxiliary parts are respectively connected in two cutters (9), the lower end of the auxiliary part penetrates the cutter (9), the fixed plate (6) and extends into the male die (2), and the auxiliary part is located outside the driving part.

2. The all-transparency injection molding product and automatic cutting-off of the sprue head injection molding device according to claim 1, characterized in that: The driving part includes a conveying pipeline (3), the conveying pipeline (3) is installed at the side end of the male die (2), and the conveying pipeline (3) extends into the male die (2), two push mechanisms are symmetrically connected and installed on the upper end of the conveying pipeline (3), two push mechanisms are movably arranged at the lower end of two fixed plates (6), and the movable part of the push mechanism penetrates the fixed plate (6) and is connected with the bottom plate (7).

3. The all-transparency injection molding product and automatic cutting-off of the sprue head injection molding device according to claim 2, characterized in that: The push mechanism includes two oil cylinders (31), two oil cylinders (31) are movably arranged at the upper end of the conveying pipeline (3), the movable part of the oil cylinder (31) is movably arranged at the lower end of the fixed plate (6), and the movable part of the oil cylinder (31) penetrates the fixed plate (6) and is connected with the bottom plate (7).

4. The all-transparency injection molding product and automatic cutting-off of the sprue head injection molding device according to claim 3, characterized in that: The reset assembly includes a transmission rod (4), the transmission rod (4) is in inverted T shape, the transmission rod (4) is arranged at the movable part of the oil cylinder (31), the vertical part of the transmission rod (4) is movably arranged at the lower end of the fixed plate (6), and the vertical part of the transmission rod (4) penetrates the fixed plate (6) and is connected with the bottom plate (7), the first elastic element (5) is arranged between the upper end of the horizontal part of the transmission rod (4) and the lower end of the fixed plate (6), and the first elastic element (5) is located outside the vertical part of the transmission rod (4).

5. The all-transparency injection molding product and automatic cutting-off of the sprue head injection molding device according to claim 3, characterized in that: The auxiliary part includes a blocking plate (91) which is slidingly connected in the cutter (9), the lower end of the blocking plate (91) penetrates the fixed plate (6), the bottom plate (7) and extends into the male mold (2), and the blocking plate (91) is located inside the oil cylinder (31), the upper end of the blocking plate (91) is downwardly recessed to form a tapered groove, the lower end of the blocking plate (91) is provided with a suction pipe (92) which penetrates the blocking plate (91) and is arranged in communication with the tapered groove, a tapered column (921) is fitted in the tapered groove, and the tapered column (921) extends out of the upper side of the tapered groove, two connecting rods (922) are symmetrically installed at the outer end of the tapered column (921), and the other ends of the two connecting rods (922) are connected with the inner wall of the cutter (9), and the lower end of the suction pipe (92) is connected with a drawing mechanism.

6. The all-transparency injection molding product and automatic cutting-off of the sprue head injection molding device according to claim 5, characterized in that: The drawing mechanism includes a plug (93) which is arranged at the lower end of the suction pipe (92) and penetrates the plug (93), the lower end of the plug (93) is threadedly connected with an outer cylinder (94), and the plug (93) extends into the outer cylinder (94), the lower end of the outer cylinder (94) is connected with a drawing device, and the drawing device is arranged in the male mold (2), the lower end of the plug (93) is connected with a straight cylinder (97), and the straight cylinder (97) is arranged in communication with the suction pipe (92), the lower end of the straight cylinder (97) is threadedly connected with a filter bag (96), and the straight cylinder (97) extends into the filter bag (96), and the straight cylinder (97) is arranged in communication with the filter bag (96).

7. The all-transparency injection molding product and automatic cutting-off of the sprue tip injection molding device according to claim 1, characterized in that: The feeding part includes an injection port (11) which is arranged at the upper end of the female mold (1) and extends into the female mold (1), two flow channels (12) are symmetrically installed in the female mold (1), and the flow channels (12) extend to the lower end of the female mold (1), the upper ends of the two flow channels (12) are arranged in communication with the injection port (11), and the outlets of the two flow channels (12) are respectively located directly above the two cutters (9), and the upper end of the cutter (9) is larger in size than the outlet of the flow channel (12).

8. The all-transparency injection molding product and automatic cutting-off of the sprue head injection molding device according to claim 1, characterized in that: The upper end of the panel (8) is downwardly recessed to form a plurality of mounting grooves, and the mounting grooves are located outside the cutter (9), a second elastic member (81) is arranged in each of the mounting grooves, and the second elastic member (81) extends out of the upper side of the mounting groove and is connected with the top end inside the cavity.

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