Rapid demolding mold for plastic shell

Abstract

The utility model provides a plastic shell quick demoulding mould which comprises a static mould base and a movable mould base, a containing groove and a movable plate located in the containing groove are arranged in the static mould base, and a supporting spring is arranged below the movable plate. The top of the moving plate is fixedly connected with an ejector block with one end opposite to a mold cavity of the static mold and transmission rods located on the two sides of the static mold, and the delay triggering mechanism is arranged between the moving mold base and the static mold base and located on the two sides of the static mold. According to the utility model, the delay trigger mechanism for controlling the delay action of the transmission rod is arranged between the static mold base and the movable mold base, so that the demolding treatment of a product has hysteresis in the mold splitting process, the problem of product deformation caused by pushing of the ejector block can be effectively avoided, and the quality of the product after demolding is improved.

Description

Technical Field

[0001] This utility model relates to the field of plastic mold application technology, specifically a quick demolding mold for plastic shells. Background Technology

[0002] In the production process of plastic products, plastic molds are used to inject flowing plastic raw materials into the mold after the mold is closed, and the product is formed by cooling. However, some common plastic molds still require manual demolding, which is a relatively slow process to prevent uneven stress on the lid of the food container, which could lead to deformation and breakage. Using external demolding structures to assist in demolding increases the complexity of the process. At the same time, common molds have poor cooling effects, and the time required for the plastic to cool and solidify is long, which is not conducive to improving production efficiency.

[0003] Utility model CN218640256U discloses a quick-release mold for food storage container lids, comprising a base, a stationary mold, and a moving mold. The base has a transition groove, one end of which connects to an air supply pipe, and the other end of which connects to a connecting groove located at one end of the stationary mold base, which is fixedly connected to the surface of the base. The stationary mold has a molding cavity with a sliding groove at its bottom, and a top block is fixedly connected to the surface of a movable plate. The movable plate is slidably connected to a storage groove via a fixed spring, and the top block is slidably connected to the sliding groove via the movable plate. The moving mold has an injection cavity connected to a material supply pipe, and is fixedly connected to the lower surface of the moving mold base. An electric cylinder is fixedly connected to the upper surface of the moving mold base, and the electric cylinder is fixedly connected to the surface of a fixed frame, which is fixedly connected to the surface of the base. This quick-release mold for food storage container lids enables rapid demolding, thereby improving product production efficiency.

[0004] However, the above-mentioned existing technology still has shortcomings in use: during mold separation, the moving plate is directly pushed by the spring, which in turn drives the top block to squeeze the product. This method of simultaneous mold separation and material pushing can easily deform the product with high temperature, thereby affecting the quality of the product. In other words, the above-mentioned existing technology does not have the function of delayed demolding.

[0005] Therefore, this utility model provides a quick demolding mold for plastic shells. Utility Model Content

[0006] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a quick demolding mold for plastic shells to solve the problems mentioned in the background technology. This utility model has the function of delayed demolding during the mold parting process, so that the product can be demolded after hardening, thereby ensuring the quality of the product after demolding.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a quick demolding mold for a plastic shell, comprising a stationary mold base and a moving mold base. The stationary mold base has a receiving groove and a movable plate located within the receiving groove. A support spring is provided below the movable plate. A top block with one end opposite to the mold cavity of the stationary mold and transmission rods located on both sides of the stationary mold are fixedly connected to the top of the movable plate. The key feature is that a time-delay triggering mechanism is provided between the moving mold base and the stationary mold base, located on both sides of the stationary mold. The time-delay triggering mechanism is movably connected to the adjacent transmission rods. Under the action of the time-delay triggering mechanism, the movement of the movable plate lags behind that of the stationary mold base.

[0008] Furthermore, the delay triggering mechanism includes a lower support, a connecting rod, and an upper limit bracket. The lower support is fixedly mounted on the upper surface of the stationary mold base, and the upper limit bracket is fixedly mounted on the lower surface of the moving mold base. The connecting rod is rotatably connected to the top of the lower support, and one end of the connecting rod is rotatably and slidably engaged with the top of the transmission rod. The other end of the connecting rod is fixedly connected to a stop arm whose side abuts against the bottom of the upper limit bracket, and the top of the stop arm is fixedly connected to a diagonal rod.

[0009] Furthermore, the upper limit frame is a groove-shaped frame and a roller is fitted on the crossbeam at its bottom. The outer peripheral wall of the roller is provided with an annular limiting groove that is adapted to the stop arm and the diagonal bar.

[0010] Furthermore, a limiting shaft is fixedly connected to one side of the transmission rod, a rotating sleeve is sleeved on the limiting shaft, a guide block is fixedly sleeved on the outside of the rotating sleeve, and a waist-shaped hole is opened on one side of the connecting rod to slide with the guide block.

[0011] Furthermore, the stop arm is equipped with an air jet pipe, the outlet of which faces the mold cavity of the stationary mold.

[0012] Furthermore, a positioning sleeve is fixedly connected to the stop arm near the bottom, and a positioning tube communicating with the inner cavity is fixedly connected to the outer peripheral wall of the jet pipe. The positioning tube is fixedly sleeved inside the positioning sleeve, and a number of axially distributed jet nozzles are provided on the outer peripheral wall of the jet pipe.

[0013] Furthermore, the positioning sleeve and the positioning tube are inserted into each other, and a locking bolt is screwed through the outer peripheral wall of the positioning sleeve.

[0014] The beneficial effects of this utility model are as follows:

[0015] 1. In this utility model, by setting a delay triggering mechanism between the stationary mold base and the moving mold base to control the delayed action of the transmission rod, the demolding process of the product has a lag during the mold parting process. This setting can effectively avoid the problem of product deformation caused by the ejector block pushing the material, and improve the quality of the product after demolding.

[0016] 2. In this utility model, the delayed triggering mechanism is provided with an arm. By installing an air outlet and an air jet pipe opposite to the stationary mold cavity on the arm, gas can be blown into the inner cavity of the product when the product is exposed but not demolded, which accelerates the cooling and hardening of the product. When the transmission rod is triggered, the top block can quickly eject the product, thereby improving the demolding efficiency. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of a quick demolding mold for a plastic shell according to the present invention;

[0018] Figure 2 for Figure 1 The main view;

[0019] Figure 3 This is a schematic diagram of the quick demolding mold for a plastic shell after the mold is separated according to this utility model.

[0020] In the diagram: 1. Static mold base; 11. Storage slot; 2. Moving mold base; 3. Moving plate; 4. Support spring; 5. Top block; 6. Transmission rod; 61. Limiting shaft; 611. Rotating sleeve; 6111. Guide block; 7. Delayed triggering mechanism; 71. Lower bracket; 72. Connecting rod; 721. Stop arm; 7211. Diagonal bar; 722. Waist-shaped hole; 723. Positioning sleeve; 73. Upper limit bracket; 731. Roller; 7311. Annular limiting groove; 8. Air jet pipe; 81. Positioning tube; 82. Air jet nozzle; 9. Locking bolt. Detailed Implementation

[0021] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0022] Please see Figures 1 to 3 This utility model provides a technical solution: a quick demolding mold for plastic shells, including a static mold base 1 and a moving mold base 2. The moving mold base 2 is located above the static mold base 1, and a moving mold is provided at the lower part of the moving mold base 2. The static mold base 1 is provided with a receiving groove 11 and a movable plate 3 located in the receiving groove 11. A support spring 4 is provided below the movable plate 3. The support spring 4 provides an elastic pushing force for the upward movement of the movable plate 3. A top block 5 with one end opposite to the mold cavity of the static mold and transmission rods 6 located on both sides of the static mold are fixedly connected to the top of the movable plate 3. When the transmission rods 6 move downward, the movable plate 3 moves downward and the support spring 4 is compressed. It should be noted that this technical solution is an improvement on the shortcomings of the prior art. The structures described in other related descriptions can all adopt the structures in the patent documents mentioned in the background art.

[0023] In this technical solution, a delayed triggering mechanism 7 is provided between the moving mold base 2 and the stationary mold base 1, located on both sides of the stationary mold. This delayed triggering mechanism 7 is movably connected to the adjacent transmission rod 6. Under the action of the delayed triggering mechanism 7, the movement of the moving plate 3 lags behind that of the stationary mold base 1. That is to say, as the moving mold base 2 moves away from the stationary mold base 1, the product is first exposed for a period of time. During this period, the product will harden rapidly, and then the transmission rod 6 will move upward and demold the product through the top block 5. This delayed demolding method can effectively avoid the problem of product deformation and improve the quality of the product after demolding.

[0024] Specifically, the delay triggering mechanism 7 includes a lower support 71, a connecting rod 72, and an upper limit bracket 73. The lower support 71 is fixedly mounted on the upper end surface of the stationary mold base 1, and the upper limit bracket 73 is fixedly mounted on the lower end surface of the moving mold base 2. The top of the connecting rod 72 and the lower support 71 are rotatably connected, and one end of the connecting rod is rotatably and slidably engaged with the top of the transmission rod 6. In a preferred embodiment, a limiting shaft 61 is fixedly connected to one side of the transmission rod 6. A rotating sleeve 611 is sleeved on the limiting shaft 61, and a guide block 6111 is fixedly sleeved on the outside of the rotating sleeve 611. A waist-shaped hole 722 is opened on one side of the connecting rod 72, which is slidably engaged with the guide block 6111. The other end of the connecting rod 72 is fixedly connected to a stop arm 721 that abuts against the bottom of the upper limit frame 73 on one side. The top of the stop arm 721 is fixedly connected to a slant bar 7211. When the moving mold base 2 moves upward, the bottom end of the upper limit frame 73 will move upward along one side of the stop arm 721. When the bottom end of the upper limit frame 73 enters the slant bar 7211, the stop arm 721 will swing towards the mold cavity. At this time, the connecting rod 72 swings under the push of the transmission rod 6, and the support spring 4 will push the moving plate 3 upward to achieve the demolding function.

[0025] Furthermore, the upper limit frame 73 is a slotted frame and a roller 731 is fitted on the crossbeam at its bottom. The outer peripheral wall of the roller 731 is provided with an annular limiting groove 7311 that is adapted to the stop arm 721 and the inclined rod 7211. This arrangement can reduce the friction between the upper limit frame 73 and the stop arm 721 and the inclined rod 7211, and avoid the problem of wear affecting the transmission accuracy.

[0026] In addition, the stop arm 721 is equipped with an air jet pipe 8. The air outlet of the air jet pipe 8 faces the mold cavity of the stationary mold. When in use, the air inlet of the air jet pipe 8 is connected to the external cold air pipe through the pipeline. When the mold is separated to the point where the product is exposed and the moving plate 3 has not moved, the air jet pipe 8 blows air directly onto the product to accelerate the cooling and hardening of the product. When the moving plate 3 moves up, the demolding function can be quickly realized.

[0027] Specifically, a positioning sleeve 723 is fixedly connected to the bottom of the stop arm 721. A positioning tube 81 communicating with the inner cavity is fixedly connected to the outer peripheral wall of the jet pipe 8. The positioning tube 81 is fixedly sleeved inside the positioning sleeve 723. Several axially distributed jet nozzles 82 are provided on the outer peripheral wall of the jet pipe 8. The gas sprayed by the several jet nozzles 82 can cover the entire product. In use, the positioning tube 81 is connected to the external air supply line through a connector. The positioning sleeve 723 and the positioning tube 81 are inserted and fitted together. A locking bolt 9 is screwed through the outer peripheral wall of the positioning sleeve 723. The jet pipe 8 can be removed by loosening the locking bolt 9. This arrangement has the advantage of facilitating the replacement of the jet pipe 8.

[0028] Working principle: When the mold needs to be separated after the casting is completed, the moving mold base 2 is controlled to move upward, the moving mold leaves the stationary mold, and the product is exposed. The air jet pipe 8 blows air onto the product through the air jet nozzle 82 to cool it down. When the roller 731 rolls onto the inclined bar 7211, the stop arm 721 swings inward at this time. At the same time, the support spring 4 pushes the moving plate 3 to move upward, and the top block 5 moves upward to push the product out of the stationary mold cavity.

[0029] Furthermore, it should be understood that 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, and 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 quick demolding mold for a plastic shell, comprising a stationary mold base (1) and a moving mold base (2), wherein the stationary mold base (1) is provided with a receiving groove (11) and a movable plate (3) located within the receiving groove (11), a support spring (4) is provided below the movable plate (3), and a top block (5) with one end opposite to the mold cavity of the stationary mold and transmission rods (6) located on both sides of the stationary mold are fixedly connected to the top of the movable plate (3), characterized in that, A time-delay triggering mechanism (7) is provided between the moving mold base (2) and the stationary mold base (1) on both sides of the stationary mold. The time-delay triggering mechanism (7) is movably connected to the adjacent transmission rod (6). Under the action of the time-delay triggering mechanism (7), the movement of the moving plate (3) lags behind the stationary mold base (1).

2. The quick demolding mold for a plastic shell according to claim 1, characterized in that: The delay triggering mechanism (7) includes a lower bracket (71), a connecting rod (72), and an upper limit bracket (73). The lower bracket (71) is fixedly mounted on the upper surface of the stationary mold base (1), and the upper limit bracket (73) is fixedly mounted on the lower surface of the moving mold base (2). The top of the connecting rod (72) is rotatably connected to the lower bracket (71), and one end of the connecting rod is rotatably and slidably engaged with the top of the transmission rod (6). The other end of the connecting rod (72) is fixedly connected to a stop arm (721) that abuts against the bottom of the upper limit bracket (73) on one side. The top of the stop arm (721) is fixedly connected to a diagonal rod (7211).

3. The quick demolding mold for a plastic shell according to claim 2, characterized in that: The upper limit frame (73) is a groove-shaped frame and a roller (731) is sleeved on the crossbeam at its bottom. The outer peripheral wall of the roller (731) is provided with an annular limiting groove (7311) that is adapted to the stop arm (721) and the diagonal bar (7211).

4. The quick demolding mold for a plastic shell according to claim 2, characterized in that: A limiting shaft (61) is fixedly connected to one side of the transmission rod (6), and a rotating sleeve (611) is sleeved on the limiting shaft (61). A guide block (6111) is fixedly sleeved on the outside of the rotating sleeve (611). A waist-shaped hole (722) that slides with the guide block (6111) is opened on one side of the connecting rod (72).

5. A quick demolding mold for a plastic shell according to claim 2, characterized in that: The stop arm (721) is provided with an air jet pipe (8), the outlet of which faces the mold cavity of the stationary mold.

6. The quick demolding mold for a plastic shell according to claim 5, characterized in that: A positioning sleeve (723) is fixedly connected to the bottom of the stop arm (721), and a positioning tube (81) communicating with the inner cavity is fixedly connected to the outer peripheral wall of the jet pipe (8). The positioning tube (81) is fixedly sleeved in the positioning sleeve (723), and a number of axially distributed jet nozzles (82) are provided on the outer peripheral wall of the jet pipe (8).

7. A quick demolding mold for a plastic shell according to claim 6, characterized in that: The positioning sleeve (723) and the positioning tube (81) are inserted into each other, and a locking bolt (9) is screwed through the outer peripheral wall of the positioning sleeve (723).

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