Plastic cup cover injection mold

Abstract

The utility model discloses a plastic cup cover injection mold, which relates to the technical field of molds and comprises a fixed mold and a demolding mechanism, a movable mold is arranged on the front side of the fixed mold, a plurality of mold cores are arranged on the front side of the fixed mold, a plurality of mold cavities are arranged on the back side of the movable mold, the demolding mechanism comprises a plurality of ejector rods, and first movable holes are arranged on the inner walls of the mold cavities. A plurality of second movable holes are formed in the front surface of the fixed mold. According to the utility model, the ejector rods extend out of the first movable holes, so that the ejector rods enter the cavities to extrude the formed cup covers until all the cup covers are separated from the corresponding cavities, then the mold cores move towards the interiors of the second movable holes, and the cup covers sleeved on the outer walls of the mold cores cannot move along with the mold cores through the limiting of the front surface of the fixed mold; and the cup cover is gradually separated from the mold core until the mold core is completely immersed into the second movable hole, so that all the cup covers sleeving the mold core are separated from the mold core and fall off, the manual demolding operation is reduced, and the demolding efficiency of the mold is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of molds, in particular to an injection mold for a plastic cup cover. Background Art

[0002] The lid of a plastic cup is generally made by injection molding.

[0003] A core and a cavity are provided inside the mold. When the mold is closed, the core is inserted into the cavity. At this time, the remaining space in the cavity is the same as the shape of the cup lid. The external injection molding equipment injects the molten plastic into the cavity, waits for the plastic to cool so that the cup lid is formed, and then opens the mold to remove the cup lid.

[0004] However, since the cup lids are relatively small and in order to increase the production efficiency of the cup lids, multiple sets of cores and cavities are set in the mold, so that the mold can obtain multiple cup lids after completing one injection molding work. However, since the cup lids will stick to the mold after cooling, after the mold is opened, the cup lids will appear to be either covered on the core or inserted in the cavity. These cup lids need to be demolded manually, which reduces the demolding efficiency of the mold. Utility Model Content

[0005] The purpose of the utility model is to provide an injection mold for a plastic cup cover to solve the problems raised in the above background technology.

[0006] To achieve the above purpose, the utility model provides the following technical solution: a plastic cup cover injection mold, comprising:

[0007] A fixed mold, a movable mold is arranged on the front of the fixed mold, a guide mechanism is arranged between the fixed mold and the movable mold, a plurality of cores are arranged on the front of the fixed mold, and a plurality of cavities are opened on the back of the movable mold;

[0008] A demoulding mechanism is arranged between the fixed mold and the movable mold, and includes a plurality of ejector pins. A first movable hole is opened on the inner wall of the cavity, and the outer wall of the ejector pin is movably connected to the inner wall of the first movable hole. A plurality of second movable holes are opened on the front side of the fixed mold, and the outer wall of the core is movably connected to the inner wall of the second movable hole.

[0009] Preferably, a first movable cavity is opened inside the movable mold, a first movable plate is slidably connected inside the first movable cavity, and one end of each of the plurality of ejector rods is fixedly connected to the back side of the first movable plate.

[0010] Preferably, a second movable cavity is opened inside the fixed mold, the inner wall of the second movable cavity is slidably connected to a second movable plate, the front side of the second movable plate is fixedly connected to a plurality of connecting plates, the core is fixedly connected to the front side of the connecting plate, a connecting mechanism is arranged between the first movable plate and the second movable plate, and a driving mechanism is arranged on the back side of the fixed mold.

[0011] Preferably, the connecting mechanism includes a movable plate symmetrically fixedly connected to the back side of the first movable plate, the inner wall of the first movable cavity is provided with a first connecting groove, the outer wall of the movable plate is movably connected to the inner wall of the first connecting groove, the inner wall of the second movable cavity is provided with a second connecting groove, one end of the movable plate passes through the interior of the second connecting groove and extends to the interior of the second movable cavity, the inner wall of the second movable cavity is rotatably connected with a gear, the outer wall of the movable plate is fixedly connected with a first rack, the outer wall of the first rack is meshingly connected with the outer wall of the gear, the outer wall of the connecting plate is fixedly connected with a second rack, and the outer wall of the second rack is meshingly connected with the outer wall of the gear.

[0012] Preferably, the driving mechanism includes a hydraulic cylinder, which is installed on the back of the fixed mold, and the output end of the hydraulic cylinder passes through the back of the fixed mold and is transmission-connected to the back of the second movable plate, and a plurality of limit mechanisms are arranged between the second movable plate and the second movable cavity.

[0013] Preferably, the limiting mechanism comprises a limiting rod, the limiting rod is fixedly connected to the back side of the second movable plate, a limiting hole is provided on the back side of the fixed mold, and the outer wall of the limiting rod is movably interlaced with the inner wall of the limiting hole.

[0014] Preferably, the guiding mechanism includes a movable seat, the back side of the movable seat is fixedly connected to the front side of the movable mold, guide rods are fixedly connected to multiple corners on the back side of the movable seat, a plurality of guide holes are opened on the front side of the fixed mold, and the outer walls of the plurality of guide rods are movably connected to the inner walls of the plurality of guide holes.

[0015] Preferably, a flow groove is provided between two adjacent cavities, an injection hole is provided at the top of the movable mold, and the interior of the injection hole is fluidically connected to the interior of the cavity.

[0016] Technical effects and advantages of the utility model:

[0017] The utility model utilizes the setting of the first movable hole, the push rod and the second movable hole. The push rod is extended from the first movable hole to allow the push rod to enter the cavity, thereby squeezing the formed cup covers out of the cavity until all the cup covers are separated from the corresponding cavities. Then the core moves toward the inside of the second movable hole. The cup covers sleeved on the outer wall of the core cannot move together through the limiting function of the front surface of the fixed mold. The cup covers move with the core, so that the cup covers are gradually separated from the core until the core is completely immersed in the second movable hole. All the cup covers sleeved on the core are separated from the core and fall off, thereby reducing the operation of manual demolding and improving the demolding efficiency of the mold. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model.

[0019] Figure 2 It is a schematic diagram of the cross-sectional structure of the utility model in top view.

[0020] Figure 3 For this utility model Figure 2 Schematic diagram of the local enlarged structure at A.

[0021] In the figure: 101, fixed mold; 102, movable mold; 103, cavity; 104, core; 201, first movable hole; 202, ejector rod; 203, second movable hole; 301, first movable cavity; 302, first movable plate; 401, second movable cavity; 402, second movable plate; 403, connecting plate; 501, first connecting groove; 502, second connecting groove; 503, movable plate; 504, gear; 505, first rack; 506, second rack; 601, hydraulic cylinder; 701, limiting rod; 702, limiting hole; 801, movable seat; 802, guide rod; 803, guide hole; 901, flow groove; 902, injection hole. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] The utility model provides Figure 1-3The plastic cup lid injection mold shown in the figure comprises a fixed mold 101 and a demoulding mechanism, a movable mold 102 is arranged on the front of the fixed mold 101, a guiding mechanism is arranged between the fixed mold 101 and the movable mold 102, a plurality of cores 104 are arranged on the front of the fixed mold 101, a plurality of cavities 103 are arranged on the back of the movable mold 102, the guiding mechanism comprises a movable seat 801, the back of the movable seat 801 is fixedly connected to the front of the movable mold 102, a plurality of corners on the back of the movable seat 801 are fixedly connected with guide rods 802, a plurality of guide holes 803 are arranged on the front of the fixed mold 101, the outer walls of the plurality of guide rods 802 are movably connected with the inner walls of the plurality of guide holes 803, a flow groove 901 is arranged between two adjacent cavities 103, and an injection hole 902 is arranged on the top of the movable mold 102 The interior of the injection hole 902 is fluidically connected to the interior of the cavity 103, and the external moving mechanism is connected to the moving seat 801, which can drive the moving seat 801 to move, thereby driving the movable mold 102 to move, so that the fixed mold 101 and the movable mold 102 can be molded and opened, and at the same time, the guide rod 802 and the guide hole 803 are mutually limited and guided, so that the opening and closing of the fixed mold 101 and the movable mold 102 are more stable. After the movable mold 102 is molded, the external spiral injection molding machine is inserted into the injection hole 902 and injects molten plastic into the injection hole 902. The molten plastic fills all the cavities 103 through the flow groove 901 until the plastic is cooled and formed in the cavity 103, and the plastic cup cover can be obtained. Then the fixed mold 101 and the movable mold 102 are opened, and the formed cup cover can be removed.

[0024] In a preferred embodiment, the demoulding mechanism is arranged between the fixed mold 101 and the movable mold 102, and the demoulding mechanism includes a plurality of ejector pins 202. A first movable hole 201 is provided on the inner wall of the cavity 103, and the outer wall of the ejector pin 202 is movably connected with the inner wall of the first movable hole 201. A plurality of second movable holes 203 are provided on the front of the fixed mold 101, and the outer wall of the core 104 is movably connected with the inner wall of the second movable hole 203. When the fixed mold 101 and the movable mold 102 are opened, the ejector pin 202 can be extended from the first movable hole 201 to allow the ejector pin 202 to enter the cavity 103. Thereby, the formed cup lids are squeezed out of the cavity 103 until all the cup lids are separated from the corresponding cavity 103, and then the core 104 moves toward the inside of the second movable hole 203. The front surface of the fixed mold 101 is limited so that the cup lids sleeved on the outer wall of the core 104 cannot move together, and can move with the core 104, so that the cup lids are gradually separated from the core 104 until the core 104 is completely immersed in the second movable hole 203, so that all the cup lids sleeved on the core 104 are separated from the core 104 and fall off, thereby reducing the operation of manual demolding and improving the demolding efficiency of the mold.

[0025] Among them, a first movable cavity 301 is opened inside the movable mold 102, and a first movable plate 302 is slidably connected inside the first movable cavity 301. One ends of multiple ejector rods 202 are fixedly connected to the back of the first movable plate 302. Through the setting of the first movable plate 302, the movement of the first movable plate 302 can drive all the ejector rods 202 to move, thereby improving the convenience of the demoulding mechanism.

[0026] Among them, a second movable cavity 401 is opened inside the fixed mold 101, and the inner wall of the second movable cavity 401 is slidably connected to the second movable plate 402, and the front of the second movable plate 402 is fixedly connected to multiple connecting plates 403, the core 104 is fixedly connected to the front of the connecting plate 403, and a connecting mechanism is arranged between the first movable plate 302 and the second movable plate 402. A driving mechanism is arranged on the back of the fixed mold 101, and all the cores 104 can be driven to move together by moving the second movable plate 402, thereby improving the convenience of the demolding mechanism.

[0027] The connecting mechanism includes a movable plate 503 symmetrically fixedly connected to the back of the first movable plate 302, a first connecting groove 501 is provided on the inner wall of the first movable cavity 301, and the outer wall of the movable plate 503 is movably connected with the inner wall of the first connecting groove 501, and a second connecting groove 502 is provided on the inner wall of the second movable cavity 401, and one end of the movable plate 503 passes through the interior of the second connecting groove 502 and extends to the interior of the second movable cavity 401, and the inner wall of the second movable cavity 401 is rotatably connected with a gear 504, and the outer wall of the movable plate 503 is fixedly connected with a first rack 505, and the outer wall of the first rack 505 is meshed with the outer wall of the gear 504, and the outer wall of the connecting plate 403 is fixedly connected with a second rack 506, and the outer wall of the second rack 506 is meshed with the outer wall of the gear 504. When the fixed mold 101 and the movable mold 102 are demolded, the movable mold 102 moves, but due to the meshing of the first rack 505 and the gear 504, the movable mold 102 moves. The plate 503 does not move, which means that the first movable plate 302 does not move, and thus the ejector pin 202 does not move. Therefore, the movable mold 102 and the ejector pin 202 move relative to each other, so that the ejector pin 202 enters the cavity 103, until the ejector pin 202 completely ejects the cup cover from the cavity 103. At this time, the cup cover is limited by the ejector pin 202, so that all the cup covers are still sleeved on the outer wall of the core 104. Then the second movable plate 402 moves, so that the connecting plate 403 moves. The movement of the connecting plate 403 causes the core 104 to move inwardly 204, so that the cup cover is gradually separated from the core 104. At the same time, through the engagement between the second rack 506, the gear 504 and the first rack 505, the movable plate 503 and the core 104 move away from each other, so that the push rod 202 moves away from each other, so that the push rod 202 is also separated from the cup cover, until the core 104 is completely immersed in the second movable hole 203, so that all the cup covers can be demolded.

[0028] Among them, the driving mechanism includes a hydraulic cylinder 601, which is installed on the back of the fixed mold 101. The output end of the hydraulic cylinder 601 passes through the back of the fixed mold 101 and is transmission-connected to the back of the second movable plate 402. A plurality of limit mechanisms are arranged between the second movable plate 402 and the second movable cavity 401. The second movable plate 402 can be moved by the operation of the hydraulic cylinder 601. The hydraulic cylinder 601 is electrically connected to an external power supply through an external switch, which is convenient for the operator to control the hydraulic cylinder 601 and improves the safety and convenience of the operation of the hydraulic cylinder 601.

[0029] Among them, the limiting mechanism includes a limiting rod 701, which is fixedly connected to the back side of the second movable plate 402, and a limiting hole 702 is opened on the back side of the fixed mold 101. The outer wall of the limiting rod 701 and the inner wall of the limiting hole 702 are movably connected and interlaced. The limiting rod 701 and the limiting hole 702 limit each other, so that the hydraulic cylinder 601 can drive the second movable plate 402 to move without deflection, so that the core 104 can move stably in the second movable hole 203 without causing wear to the core 104, so that the core 104 and the cavity 103 can cooperate to stably form the cup cover.

[0030] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A plastic cup cover injection mold, characterized in that: include: A fixed mold (101), a movable mold (102) is arranged on the front of the fixed mold (101), a guide mechanism is arranged between the fixed mold (101) and the movable mold (102), a plurality of cores (104) are arranged on the front of the fixed mold (101), and a plurality of cavities (103) are opened on the back of the movable mold (102); A demoulding mechanism is provided between a fixed mold (101) and a movable mold (102), the demoulding mechanism comprises a plurality of ejector pins (202), the inner wall of the mold cavity (103) is provided with a first movable hole (201), the outer wall of the ejector pin (202) is movably connected to the inner wall of the first movable hole (201), the front face of the fixed mold (101) is provided with a plurality of second movable holes (203), the outer wall of the core (104) is movably connected to the inner wall of the second movable hole (203).

2. The plastic cup cover injection mold according to claim 1, characterized in that: A first movable cavity (301) is provided inside the movable mold (102), a first movable plate (302) is slidably connected inside the first movable cavity (301), and one end of each of the plurality of ejector rods (202) is fixedly connected to the back of the first movable plate (302).

3. The plastic cup cover injection mold according to claim 2, characterized in that: A second movable cavity (401) is provided inside the fixed mold (101); a second movable plate (402) is slidably connected to the inner wall of the second movable cavity (401); a plurality of connecting plates (403) are fixedly connected to the front of the second movable plate (402); the core (104) is fixedly connected to the front of the connecting plate (403); a connecting mechanism is provided between the first movable plate (302) and the second movable plate (402); and a driving mechanism is provided on the back of the fixed mold (101).

4. The plastic cup cover injection mold according to claim 3, characterized in that: The connecting mechanism comprises a movable plate (503) symmetrically fixedly connected to the back side of the first movable plate (302); the inner wall of the first movable cavity (301) is provided with a first connecting groove (501); the outer wall of the movable plate (503) is movably connected to the inner wall of the first connecting groove (501); the inner wall of the second movable cavity (401) is provided with a second connecting groove (502); one end of the movable plate (503) passes through the interior of the second connecting groove (502) and extends to the interior of the second movable cavity (401); the inner wall of the second movable cavity (401) is rotatably connected to a gear (504); the outer wall of the movable plate (503) is fixedly connected to a first rack (505); the outer wall of the first rack (505) is meshingly connected to the outer wall of the gear (504); the outer wall of the connecting plate (403) is fixedly connected to a second rack (506); the outer wall of the second rack (506) is meshingly connected to the outer wall of the gear (504).

5. The plastic cup cover injection mold according to claim 3, characterized in that: The driving mechanism comprises a hydraulic cylinder (601), the hydraulic cylinder (601) is installed on the back side of the fixed mold (101), the output end of the hydraulic cylinder (601) passes through the back side of the fixed mold (101) and is transmission-connected to the back side of the second movable plate (402), and a plurality of limit mechanisms are arranged between the second movable plate (402) and the second movable cavity (401).

6. The plastic cup cover injection mold according to claim 5, characterized in that: The limiting mechanism comprises a limiting rod (701), the limiting rod (701) is fixedly connected to the back side of the second movable plate (402), a limiting hole (702) is provided on the back side of the fixed mold (101), and the outer wall of the limiting rod (701) is movably connected with the inner wall of the limiting hole (702).

7. The plastic cup cover injection mold according to claim 1, characterized in that: The guide mechanism comprises a movable seat (801), the back side of the movable seat (801) is fixedly connected to the front side of the movable mold (102), multiple corners of the back side of the movable seat (801) are fixedly connected to guide rods (802), the front side of the fixed mold (101) is provided with multiple guide holes (803), and the outer walls of the multiple guide rods (802) are movably connected to the inner walls of the multiple guide holes (803).

8. The plastic cup cover injection mold according to claim 1, characterized in that: A flow groove (901) is provided between two adjacent cavities (103), an injection hole (902) is provided at the top of the movable mold (102), and the interior of the injection hole (902) is fluidically connected to the interior of the cavity (103).

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