Food grade antibacterial plastic injection molding machine for cup cover

Abstract

This application relates to the field of injection molding equipment technology and discloses a food-grade antibacterial plastic injection molding machine for cup lids, including a base, with uprights fixedly connected to the four corners of the top of the base, and a top plate fixedly connected to the top of each upright. This food-grade antibacterial plastic injection molding machine for cup lids, by setting an ejection spring, allows the upper and lower molds to open after the workpiece is injection molded. At this time, the movable plate no longer applies pressure to the contact plate. Then, under the action of the ejection spring, the ejector rod and ejector block can move upward, thereby ejecting the injection-molded workpiece from the mold, making it easier for people to pick up the workpiece. Simultaneously, the action of the upright ensures the vertical movement of the ejector rod, preventing skewing and jamming, and improving the stability of the ejection action. Furthermore, the above-mentioned ejection structure can also avoid demolding damage, ensuring the integrity of the thin-walled cup lid (antibacterial agents are mostly distributed on the surface, and damage will reduce the antibacterial effect).

Description

Technical Field

[0001] This application relates to the field of injection molding equipment technology, specifically to a food-grade antibacterial plastic injection molding machine for cup lids. Background Technology

[0002] Injection molding machines are the main molding equipment used to make various shapes of plastic products from thermoplastic or thermosetting plastics using plastic molding dies. However, with the increasing demand for use, some existing injection molding machine structures still have certain shortcomings in use and are difficult to meet more usage needs. Therefore, a new type of injection molding structure is needed.

[0003] An existing patent (publication number: CN221161301U) discloses a plastic cup lid injection molding machine, belonging to the field of injection molding equipment technology. It includes a mold base, a connecting seat on the top of the mold base, and a feeding seat fixedly installed on the top of the connecting seat. A base is fixedly installed on the inner wall of the mold base, a threaded seat is threaded to the top of the base, a shaping seat is fixedly installed on the top of the threaded seat, a heat insulation seat is fixedly installed on the inner wall of the shaping seat, and a base plate is fixedly installed at the bottom of the mold base. This invention uses a threaded connection to install the shaping seat. The heating of the electric heating plate, located outside the feeding pipe, provides auxiliary heating to the raw material flowing inside, preventing the solidification of the liquid material. Furthermore, different models and shapes of shaping seats can be replaced according to actual usage needs to meet the processing requirements of different cup lid structures, increasing the applicability of the device.

[0004] Although the device in the aforementioned comparative document solves the problem that existing devices cannot replace the molding base of different models and shapes, making it difficult to meet the processing needs of different cup lid structures, the device lacks an ejection structure. After the workpiece is injection molded, it cannot eject the injection-molded workpiece, making it inconvenient for people to handle it. In order to solve the above problems, a food-grade antibacterial plastic injection molding machine for cup lids is proposed. Utility Model Content

[0005] To address the shortcomings of existing technologies, this application provides a food-grade antibacterial plastic injection molding machine for cup lids, which has advantages such as an ejection structure. This solves the problem that after the workpiece is injection molded, it cannot be ejected, making it inconvenient for people to handle it.

[0006] To achieve the above objectives, this application provides the following technical solution: a food-grade antibacterial plastic injection molding machine for cup lids, comprising a base, uprights fixedly connected to the four corners of the top of the base, a top plate fixedly connected to the top of the uprights, a hydraulic rod and a retraction rod fixedly connected to the top of the top plate, a connecting frame fixedly connected to the bottom of the hydraulic rod and the retraction rod, a movable plate fixedly connected to the bottom of the connecting frame, a plurality of upper molds provided at the bottom of the movable plate, a plurality of placement slots opened on the top of the base, and a lower mold installed and connected inside the placement slots; The base has a U-shaped groove inside, which is located at the bottom of the placement groove. A vertical cylinder is fixedly connected to the bottom end of the placement groove. The lower mold has a through hole inside, and the vertical cylinder is located inside the through hole. A top rod is slidably connected inside the vertical cylinder, and a top block is fixedly connected to the top end of the top rod. An inlay groove is opened at the top end of the vertical cylinder. The bottom end of the top rod is slidably connected to the U-shaped groove and is fixedly connected to a connecting plate. An ejection spring is sleeved on the surface of the top rod. The two ends of the ejection spring are fixedly connected to the top end of the U-shaped groove and the top end of the connecting plate, respectively. Two sliding rods are fixedly connected to the top of the connecting plate. The top ends of the sliding rods slide through the U-shaped groove and are fixedly connected to a contact plate. Two grooves are opened at the top of the base.

[0007] With the above solution, by setting an ejector spring, after the workpiece is injection molded, the upper mold and lower mold open. At this time, the movable plate no longer applies pressure to the contact plate. Then, under the action of the ejector spring, the ejector rod and ejector block can move upward, thereby ejecting the injection-molded workpiece from the mold, making it easier for people to pick up the workpiece. At the same time, under the action of the vertical cylinder, the ejector rod can be ensured to move vertically, which can prevent skew and jamming and improve the stability of the ejection action. In addition, the above ejection structure can also avoid demolding damage and ensure the integrity of the thin-walled cup lid.

[0008] Furthermore, the movable plate is slidably connected to the surface of the upright, the top of the upper mold is provided with a connector, and an injection tube is provided between the multiple connectors.

[0009] The above solution, by sliding the movable plate on the surface of the upright, ensures that the movable plate is precisely aligned with the lower mold during the mold closing process, which can prevent flash or dimensional deviation caused by misalignment. By sharing the injection tube, the complexity of the runner can be reduced and the production efficiency can be improved. It is suitable for small multi-cavity injection molding of cup lids.

[0010] Furthermore, the inner side of the placement slot is provided with multiple shrinkage grooves, and the top of the multiple shrinkage grooves is provided with an annular groove. Multiple fixing shells are fixedly connected to the side of the base.

[0011] The above solution, by setting a shrinkage groove, provides storage space for the sliding of the fixed rod.

[0012] Furthermore, a fixing rod is slidably connected inside the shrinkage groove, and multiple fixing holes are opened on the surface of the lower mold, with one end of the fixing rod being engaged in the fixing hole.

[0013] The above solution allows for the replacement of traditional bolt fastening by inserting a fixing rod into the fixing hole on the side wall of the lower mold, thus shortening the mold replacement time.

[0014] Furthermore, an annular block is slidably connected inside the annular groove, a second threaded toothed plate is provided at the bottom of the annular block, and a first threaded toothed plate is provided at the top of the fixed rod, with the second threaded toothed plate meshing with the first threaded toothed plate.

[0015] Through the above scheme, by meshing the first threaded tooth plate and the second threaded tooth plate, when the annular block rotates, the rotational motion can be converted into the forward and backward motion of the fixed rod.

[0016] Furthermore, an annular rack is fixedly connected to the side of the annular block, and a rotating rod is tightly nested inside the fixed shell via a bearing. A gear is fixedly connected to the surface of the rotating rod, and the gear meshes with the annular rack. The bottom end of the rotating rod rotates through the bottom of the fixed shell and is fixedly connected to a knob.

[0017] With the above scheme, by setting a knob, people can rotate the knob to make the rotating rod and gear rotate. Through the meshing of the gear and the ring rack, the ring block can be driven to slide in the ring groove, so that multiple fixed rods can be extended and retracted synchronously, and one-click mold clamping can be achieved.

[0018] Furthermore, a threaded cap is fixedly connected to the bottom of the fixed shell, a positioning ring is fixedly connected to the surface of the knob, a stabilizing bolt is threadedly connected inside the positioning ring, and the top of the stabilizing bolt is threadedly connected inside the threaded cap.

[0019] By using the above method, the top of the stabilizing bolt is threaded into the threaded cap. After the lower mold is installed, the position of the knob, rotating rod and gear can be stabilized by threading the top of the stabilizing bolt into the threaded cap, thereby preventing the position of the ring block and the fixing rod from becoming loose.

[0020] Furthermore, limit grooves are provided on both sides of the shrinkage groove, and limit blocks are fixedly connected to both sides of the fixing rod, with the limit grooves slidably connected within the limit blocks.

[0021] The above solution, by setting a limiting groove and a limiting block, can restrict the fixed rod to move only radially, thus avoiding tilting or jamming.

[0022] Compared with the prior art, the technical solution of this application has the following beneficial effects: This food-grade antibacterial plastic injection molding machine for cup lids features an ejector spring. After the workpiece is injection molded, the upper and lower molds open, and the movable plate no longer applies pressure to the contact plate. Then, under the action of the ejector spring, the ejector rod and ejector block can move upward, thereby ejecting the injection-molded workpiece from the mold. This makes it easier for people to pick up the workpiece. At the same time, the vertical cylinder ensures that the ejector rod moves vertically, preventing skewing and jamming, and improving the stability of the ejection action. The ejection structure also avoids demolding damage, ensuring the integrity of the thin-walled cup lid (antibacterial agents are mostly distributed on the surface, and damage will reduce the antibacterial effect). Attached Figure Description

[0023] Figure 1 This is a frontal three-dimensional structural diagram of this application; Figure 2 This is a side-view perspective three-dimensional structural diagram of this application; Figure 3 This is a schematic diagram of the structure in frontal cross-section in this application; Figure 4 This is a structural schematic diagram of the cross-section of the shrinkage channel in this application; Figure 5 for Figure 2 A magnified cross-sectional view of the structure at point A in the middle.

[0024] In the picture: 1. Base; 101. Upright pole; 102. Top plate; 103. Hydraulic rod; 104. Retractable rod; 105. Connecting frame; 106. Movable plate; 107. Upper mold; 108. Connector; 109. Injection tube; 1010. Placement slot; 1011. U-shaped channel; 1012. Vertical cylinder; 1013. Ejector rod; 1014. Ejector block; 1015. Inserting slot; 1016. Ejection spring; 1017. Groove; 1018. Slide rod; 1019. Contact plate 1020. Fixed shell; 1021. Shrinkage groove; 1022. Fixed rod; 1023. First threaded tooth plate; 1024. Annular groove; 1025. Annular block; 1026. Second threaded tooth plate; 1027. Annular rack; 1028. Rotating rod; 1029. Gear; 1030. Knob; 1031. Positioning ring; 1032. Threaded cap; 1033. Stabilizing bolt; 1034. Connecting plate; 1035. Limiting groove; 1036. Limiting block; 2. Lower mold; 201. Through hole; 202. Fixing hole. Detailed Implementation

[0025] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0026] Please see Figure 1 and Figure 3 This embodiment of a food-grade antibacterial plastic injection molding machine for cup lids includes a base 1. Each of the four corners of the top of the base 1 is fixedly connected to a vertical rod 101. A top plate 102 is fixedly connected to the top of the vertical rod 101. A hydraulic rod 103 and a retraction rod 104 are fixedly connected to the top of the top plate 102. A connecting frame 105 is fixedly connected to the bottom of the hydraulic rod 103 and the retraction rod 104. A movable plate 106 is fixedly connected to the bottom of the connecting frame 105. Multiple upper molds 107 are provided at the bottom of the movable plate 106. Multiple placement slots 1010 are opened on the top of the base 1, and lower molds 2 are installed and connected inside the placement slots 1010. The base 1 has a U-shaped groove 1011 inside, which is located at the bottom of the placement groove 1010. A vertical cylinder 1012 is fixedly connected to the bottom end of the placement groove 1010. The lower mold 2 has a through hole 201 inside, and the vertical cylinder 1012 is located inside the through hole 201. A push rod 1013 is slidably connected inside the vertical cylinder 1012. A push block 1014 is fixedly connected to the top end of the push rod 1013. An inlay groove 1015 is opened at the top end of the vertical cylinder 1012. The bottom end of the push rod 1013 is slidably connected to the U-shaped groove 1011 and is fixedly connected to a connecting plate 1034. An ejection spring 1016 is sleeved on the surface of the push rod 1013. The two ends of the ejection spring 1016 are fixedly connected to the top end of the U-shaped groove 1011 and the top of the connecting plate 1034, respectively. Two sliding rods 1 are fixedly connected to the top of the connecting plate 1034. 018, the top of the slide rod 1018 slides through the U-shaped groove 1011 and is fixedly connected to the contact plate 1019. The top of the base 1 has two grooves 1017. By setting the ejection spring 1016, after the workpiece is injection molded, the upper mold 107 and the lower mold 2 open. At this time, the movable plate 106 no longer applies pressure to the contact plate 1019. Then, under the action of the ejection spring 1016, the ejector rod 1013 and the ejector block 1014 can move upward, thereby ejecting the injection molded workpiece from the mold, making it easier for people to pick up the workpiece. At the same time, under the action of the vertical cylinder 1012, the ejector rod 1013 can move vertically, which can prevent skew and jamming, improve the stability of the ejection action, and the above-mentioned ejection structure can also avoid demolding damage and ensure the integrity of the thin-walled cup lid.

[0027] Please see Figure 3The movable plate 106 is slidably connected to the surface of the upright 101. The top of the upper mold 107 is provided with a connector 108, and injection tubes 109 are provided between multiple connectors 108. By sliding the movable plate 106 on the surface of the upright 101, it can be ensured that the movable plate 106 is accurately aligned with the lower mold 2 during the mold closing process, which can prevent flash or dimensional deviation caused by misalignment. By sharing the injection tube 109, the complexity of the runner can be reduced and the production efficiency can be improved. It is suitable for small multi-cavity injection molding of cup lids.

[0028] Please see Figure 2 , Figure 4 and Figure 5The inner side of the placement groove 1010 has multiple shrinkage grooves 1021, and the top of the multiple shrinkage grooves 1021 has an annular groove 1024. Multiple fixing shells 1020 are fixedly connected to the side of the base 1. By setting the shrinkage grooves 1021, storage space can be provided for the sliding of the fixing rod 1022. The fixing rod 1022 is slidably connected inside the shrinkage grooves 1021. Multiple fixing holes 202 are opened on the surface of the lower mold 2. One end of the fixing rod 1022 is snapped into the fixing hole 202. By inserting the fixing rod 1022 into the fixing hole 202 on the side wall of the lower mold 2, it can replace the traditional bolt fastening and shorten the mold replacement time. An annular block 1025 is slidably connected inside the annular groove 1024. The bottom of the annular block 1025 A second threaded toothed plate 1026 is provided, and a first threaded toothed plate 1023 is provided at the top of the fixed rod 1022. The second threaded toothed plate 1026 and the first threaded toothed plate 1023 mesh with each other. Through the meshing of the first threaded toothed plate 1023 and the second threaded toothed plate 1026, when the annular block 1025 rotates, the rotational motion can be converted into the back-and-forth motion of the fixed rod 1022. An annular rack 1027 is fixedly connected to the side of the annular block 1025. A rotating rod 1028 is tightly nested inside the fixed shell 1020 through bearings. A gear 1029 is fixedly connected to the surface of the rotating rod 1028. The gear 1029 meshes with the annular rack 1027. The bottom end of the rotating rod 1028 rotates through the fixed shell 102. At the bottom of the fixed housing 1020, a knob 1030 is fixedly connected. By rotating the knob 1030, the rotating rod 1028 and gear 1029 can be rotated. Through the meshing of gear 1029 and annular rack 1027, the annular block 1025 can be driven to slide in annular groove 1024, thereby enabling multiple fixed rods 1022 to extend and retract synchronously, achieving one-click mold clamping. A threaded cap 1032 is fixedly connected to the bottom of the fixed housing 1020. A positioning ring 1031 is fixedly connected to the surface of the knob 1030. A stabilizing bolt 1033 is threadedly connected inside the positioning ring 1031. The top of the stabilizing bolt 1033 is threadedly connected to the threaded cap 1032. The top thread is connected to the threaded cap 1032. After the lower mold 2 is installed, the top thread of the stabilizing bolt 1033 is connected to the threaded cap 1032. This can stabilize the position of the knob 1030, the rotating rod 1028 and the gear 1029, thereby preventing the position of the annular block 1025 and the fixing rod 1022 from becoming loose. The shrinkage groove 1021 has limit grooves 1035 on both sides. The fixing rod 1022 is fixedly connected to limit blocks 1036 on both sides. The limit groove 1035 is slidably connected to the limit block 1036. By setting the limit groove 1035 and the limit block 1036, the fixing rod 1022 can be restricted to move only radially, which can prevent tilting or jamming.

[0029] In this embodiment, by setting the ejector spring 1016, after the workpiece is injection molded, the upper mold 107 and the lower mold 2 open. At this time, the movable plate 106 no longer applies pressure to the contact plate 1019. Then, under the action of the ejector spring 1016, the ejector rod 1013 and the ejector block 1014 can move upward, thereby ejecting the injection-molded workpiece from the mold, making it easier for people to pick up the workpiece. At the same time, under the action of the vertical cylinder 1012, the ejector rod 1013 can move vertically, which can prevent skew and jamming, and improve the stability of the ejection action. At the same time, the above-mentioned ejection structure can also avoid demolding damage and ensure the integrity of the thin-walled cup lid (the antibacterial agent is mostly distributed on the surface, and damage will reduce the antibacterial effect).

[0030] The working principle of the above embodiment is as follows: In use, the lower mold 2 is placed into the placement groove 1010. After placement, the stabilizing bolt 1033 is rotated to remove the top of the stabilizing bolt 1033 from the threaded cap 1032. After removal, the knob 1030 is rotated to rotate the rotating rod 1028 and the gear 1029. Then, through the meshing of the gear 1029 and the annular rack 1027, the annular block 1025 can be driven to slide in the annular groove 1024. Then, through the first threaded tooth plate 1... The engagement of 023 with the second threaded tooth plate 1026 can drive the fixed rod 1022 to slide in the shrinkage groove 1021, allowing one end of the fixed rod 1022 to move into the fixed hole 202, thereby stabilizing the position of the lower mold 2 in the placement groove 1010. After stabilization, the stabilizing bolt 1033 is rotated so that the top of the stabilizing bolt 1033 is threaded into the threaded cap 1032. After the connection is completed, the positions of multiple fixed rods 1022 can be stabilized. After stabilization, the device can be used. When the movable plate 106 moves downward, it abuts against the contact plate 1019. Then, through the linkage of the slide rod 1018 and the connecting plate 1034, the ejector rod 1013 and the ejector block 1014 can be driven to move downward, so that the ejector block 1014 can be inserted into the insert groove 1015. At the same time, the contact plate 1019 can also be inserted into the groove 1017. After the insertion is completed, the upper mold 107 and the lower mold 2 are closed. After the closure is completed, injection molding can be performed. After injection molding is completed, the upper mold 107 moves upward, and the movable plate 106 no longer applies pressure to the contact plate 1019. Then, under the action of the ejection spring 1016, the ejector rod 1013 and the ejector block 1014 can move upward, so that the injection-molded workpiece can be ejected from the mold, making it easier for people to pick up the workpiece.

[0031] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0032] Although embodiments of this application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A food grade antibacterial plastic injection molding machine for cup lid comprising a base (1) characterized in that: The base (1) has four fixed poles (101) at the top corners. The top plate (102) is fixedly connected to the top of the poles (101). The top plate (102) has a hydraulic rod (103) and a retractable rod (104) fixedly connected to the top. The bottom of the hydraulic rod (103) and the retractable rod (104) is fixedly connected to a connecting frame (105). The bottom of the connecting frame (105) is fixedly connected to a movable plate (106). The bottom of the movable plate (106) is provided with multiple upper molds (107). The top of the base (1) has multiple placement slots (1010). The placement slots (1010) are installed and connected to the lower molds (2). The base (1) has a U-shaped groove (1011) inside, which is located at the bottom of the placement groove (1010). A vertical cylinder (1012) is fixedly connected to the bottom of the placement groove (1010). The lower mold (2) has a through hole (201) inside, and the vertical cylinder (1012) is located inside the through hole (201). A top rod (1013) is slidably connected inside the vertical cylinder (1012). A top block (1014) is fixedly connected to the top of the top rod (1013). An inlay groove (1015) is opened at the top of the vertical cylinder (1012). The top rod (1014) is fixedly connected to the top of the vertical cylinder (1012). 13) The bottom end is slidably connected in the U-shaped groove (1011) and is fixedly connected to the connecting plate (1034). The surface of the push rod (1013) is fitted with an ejector spring (1016). The two ends of the ejector spring (1016) are fixedly connected to the top of the U-shaped groove (1011) and the top of the connecting plate (1034) respectively. The top of the connecting plate (1034) is fixedly connected to two slide rods (1018). The top of the slide rods (1018) slides through the U-shaped groove (1011) and is fixedly connected to a contact plate (1019). The top of the base (1) has two grooves (1017).

2. The food-grade antibacterial plastic injection molding machine for cup lids according to claim 1, characterized in that: The movable plate (106) is slidably connected to the surface of the upright (101), and the top of the upper mold (107) is provided with a connector (108), and an injection tube (109) is provided between the multiple connectors (108).

3. A food grade antibacterial plastic injection molding machine for cup lid as claimed in claim 1 wherein: The placement slot (1010) has multiple shrinkage slots (1021) on its inner side, and an annular slot (1024) is provided on the top of the multiple shrinkage slots (1021). Multiple fixing shells (1020) are fixedly connected to the side of the base (1).

4. A food grade antibacterial plastic injection molding machine for cup lid according to claim 3, characterized in that: The shrinkage groove (1021) is slidably connected to a fixing rod (1022), and the lower mold (2) has multiple fixing holes (202) on its surface. One end of the fixing rod (1022) is engaged in the fixing hole (202).

5. A food grade antibacterial plastic injection molding machine for cup lid according to claim 4, characterized in that: An annular block (1025) is slidably connected inside the annular groove (1024). A second threaded tooth plate (1026) is provided at the bottom of the annular block (1025), and a first threaded tooth plate (1023) is provided at the top of the fixed rod (1022). The second threaded tooth plate (1026) and the first threaded tooth plate (1023) mesh with each other.

6. The food-grade antibacterial plastic injection molding machine for cup lids according to claim 5, characterized in that: The annular block (1025) is fixedly connected to the side of an annular rack (1027). The inner side of the fixed shell (1020) is tightly nested with a rotating rod (1028) through a bearing. A gear (1029) is fixedly connected to the surface of the rotating rod (1028). The gear (1029) meshes with the annular rack (1027). The bottom end of the rotating rod (1028) rotates through the bottom of the fixed shell (1020) and is fixedly connected to a knob (1030).

7. A food grade antibacterial plastic injection molding machine for cup lid according to claim 6, characterized in that: The bottom of the fixed shell (1020) is fixedly connected to a threaded cap (1032), and the surface of the knob (1030) is fixedly connected to a positioning ring (1031). The positioning ring (1031) is threadedly connected to a stabilizing bolt (1033), and the top of the stabilizing bolt (1033) is threadedly connected to the threaded cap (1032).

8. A food grade antibacterial plastic injection molding machine for cup lid according to claim 4, characterized in that: The shrinkage groove (1021) has limit grooves (1035) on both sides inside, and the fixing rod (1022) is fixedly connected to limit blocks (1036) on both sides. The limit groove (1035) is slidably connected in the limit block (1036).

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