Water cooling device for mold cavity of plastic vacuum forming machine

Abstract

The utility model discloses a water cooling device for a mold cavity of a plastic vacuum forming machine, and relates to the technical field of plastic vacuum forming machines, a knocking release promoting mechanism comprises two limiting rods fixedly connected to one side of a fixing plate and a motor fixedly connected to the front face of the fixing plate, and a sliding connection transmission plate is slidably connected between the surfaces of the two limiting rods; the right side of the sliding connection transmission plate is fixedly connected with a fixing strip, the fixing strip is fixedly connected with a knocking head through a spring rod, the surface of an output shaft of the motor is fixedly connected with a transmission arm, and the inner wall of the transmission arm is fixedly connected with a transmission shaft. Knocking force can act between the mold and a product, the product is helped to be smoothly separated, demolding resistance is reduced, water and bubbles in the mold can be discharged easily, and the quality and forming precision of the product are improved.

Description

Technical Field

[0001] This utility model relates to the field of vacuum forming machine technology, specifically to a water-cooling device for the mold cavity of a vacuum forming machine. Background Technology

[0002] A vacuum forming machine (also called a thermoforming machine) is a machine that uses heated and plasticized thermoplastic plastic rolls such as PVC, PE, PP, PET, and HIPS to form various shapes of high-end packaging boxes, frames, and other products. It utilizes the vacuum suction generated by a vacuum pump to mold softened thermoplastic sheets into various shapes of vacuum covers, blister trays, and other products. During the vacuum forming process, the mold temperature rises after continuous operation, which can prevent the plastic sheet from cooling and solidifying sufficiently when covering the mold, thus affecting the product's molding quality and stability. After each vacuum forming cycle, the machine needs to be cooled to allow the product to set and ensure that the plastic sheet cools and solidifies quickly when covering the mold. However, while traditional water-cooling devices can effectively reduce mold temperature, moisture or air bubbles may accumulate inside the mold during the cooling process, affecting product quality and molding results. Furthermore, factors such as water flow distribution and mold structure can easily lead to uneven temperature distribution within the mold, making it difficult for the product to be removed from the mold. Utility Model Content

[0003] The purpose of this utility model is to provide a water-cooling device for the mold cavity of a vacuum forming machine, thereby solving the technical problems mentioned in the background art.

[0004] The objective of this utility model can be achieved through the following technical solutions:

[0005] A water-cooling device for the mold cavity of a vacuum forming machine includes a lower mold, an upper mold disposed above it, and a water tank. A fixed base is fixedly connected to the left side of the lower mold, and a fixed plate is fixedly connected to the top of the fixed base. A knocking mechanism is provided on the fixed plate.

[0006] The knocking detachment mechanism includes two limiting rods fixedly connected to one side of the fixed plate and a motor fixedly connected to the front of the fixed plate. A sliding transmission plate is slidably connected between the surfaces of the two limiting rods. A fixing strip is fixedly connected to the right side of the sliding transmission plate. A knocking head is fixedly connected to the fixing strip via a spring rod. A transmission arm is fixedly connected to the surface of the motor output shaft. A transmission shaft is fixedly connected to the inner wall of the transmission arm.

[0007] As a further embodiment of this utility model: the top of the water tank is connected to an injection port, and a circulating cooling mechanism is provided between the lower mold, the upper mold and the water tank.

[0008] As a further embodiment of this utility model: the circulating cooling mechanism includes a first cooling pipe fixedly connected to the inner wall of the lower mold, a second cooling pipe fixedly connected to the inner wall of the upper mold, and a water pump disposed on the top of the water tank. The first cooling pipe and the second cooling pipe are connected by a flexible hose. The first cooling pipe is connected to the water tank through a water outlet pipe. The water pump and the second cooling pipe are connected to each other through a water inlet pipe.

[0009] As a further embodiment of this utility model: the top of the lower mold is provided with a mold cavity, the top of the mold cavity is provided with four positioning holes, and the bottom of the upper mold is fixedly connected with a positioning rod.

[0010] As a further embodiment of this utility model, the transmission shaft and the sliding transmission plate are adapted to each other.

[0011] As a further embodiment of this utility model: four positioning rods are provided and distributed in a rectangular array at the bottom of the upper mold, and the four positioning rods are slidably connected to the adjacent positioning holes respectively.

[0012] Beneficial effects

[0013] This utility model provides a water-cooling device for the mold cavity of a vacuum forming machine. Compared with the prior art, it has the following advantages:

[0014] Beneficial effects:

[0015] (1) This application sets up a knocking release mechanism. Through the knocking of the reciprocating knocking mechanism, the knocking force can be applied between the mold and the product, which helps the product to be released smoothly, reduces the demolding resistance, and also helps to remove moisture and air bubbles inside the mold, thereby improving the quality and molding accuracy of the product.

[0016] (2) By setting up a circulating cooling mechanism, the cooling water can be circulated and cooled once after each processing, which can be reused and save water resources. Attached Figure Description

[0017] Figure 1 This is a main body diagram of the present utility model;

[0018] Figure 2 This is a perspective view of a partial structure of the present invention;

[0019] Figure 3 This is a perspective view of the tapping and detachment mechanism of this utility model;

[0020] Figure 4 This is a cross-sectional view of a partial structure of the present invention;

[0021] Figure 5 This is a diagram showing the state of the lower and upper molds after they are closed.

[0022] In the diagram: 1. Lower mold; 2. Upper mold; 3. Water tank; 4. Fixed base; 5. Fixed plate; 6. Knocking release mechanism; 61. Limiting rod; 62. Motor; 63. Sliding transmission plate; 64. Fixing strip; 65. Spring rod; 66. Knocking head; 67. Transmission arm; 68. Transmission shaft; 7. Inlet; 8. Circulating cooling mechanism; 81. First cooling pipe; 82. Second cooling pipe; 83. Water pump; 84. Hose; 85. Water outlet pipe; 86. Water inlet pipe; 9. Mold cavity; 10. Positioning hole; 11. Positioning rod. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Please see Figure 1-5 As shown, this utility model is a water-cooling device for the mold cavity of a vacuum forming machine, including a lower mold 1, an upper mold 2 disposed above it, and a water tank 3. A fixed base 4 is fixedly connected to the left side of the lower mold 1, and a fixed plate 5 is fixedly connected to the top of the fixed base 4. A knocking and detaching mechanism 6 is provided on the fixed plate 5. The knocking and detaching mechanism 6 includes two limiting rods 61 fixedly connected to one side of the fixed plate 5 and a motor 62 fixedly connected to the front of the fixed plate 5. The motor 62 is electrically connected to an external power source and is controlled by an external program. A sliding transmission plate 63 is slidably connected between the surfaces of the two limiting rods 61. A fixing strip 64 is fixedly connected to the right side of the sliding transmission plate 63. A knocking head 66 is fixedly connected to the fixing strip 64 through a spring rod 65. The spring rod 65 is designed to provide buffering force during knocking, preventing damage to the knocking head 66 caused by rigid contact, and also preventing jamming due to motion interference. A transmission arm 67 is fixedly connected to the surface of the output shaft of the motor 62, and a transmission shaft 68 is fixedly connected to the inner wall of the transmission arm 67. By setting a knocking release mechanism 6, the knocking force can be applied between the mold and the product through the knocking of the reciprocating knocking mechanism, which helps the product to be released smoothly, reduces the demolding resistance, and also helps to remove moisture and air bubbles inside the mold, thereby improving the quality and molding accuracy of the product.

[0025] The top of the water tank 3 is connected to an inlet 7. The water used for cooling will have a certain temperature increase. When the temperature is high after circulation, coolant can be added to the inlet 7 to cool the water. A circulating cooling mechanism 8 is set between the lower mold 1, the upper mold 2 and the water tank 3. By setting the circulating cooling mechanism 8, the cooling water can be circulated, and it can be cooled once after each processing, which can be reused to save water resources.

[0026] The circulating cooling mechanism 8 includes a first cooling pipe 81 fixedly connected to the inner wall of the lower mold 1, a second cooling pipe 82 fixedly connected to the inner wall of the upper mold 2, and a water pump 83 mounted on the top of the water tank 3. The water pump 83 is electrically connected to an external power source and controlled by an external program. The first cooling pipe 81 and the second cooling pipe 82 are connected by a flexible hose 84. The flexible hose 84 is a PE water pipe, which is characterized by its high elasticity, durability, heat resistance, environmental friendliness, and lightweight nature. It can be stretched and restored, is not easily damaged, and has certain heat resistance requirements. The first cooling pipe 81 is connected to the water tank 3 through an outlet pipe 85, and the water pump 83 and the second cooling pipe 82 are connected through an inlet pipe 86.

[0027] The lower mold 1 has a mold cavity 9 at its top, and four positioning holes 10 are provided at the top of the mold cavity 9. The upper mold 2 has a positioning rod fixedly connected to its bottom.

[0028] The drive shaft 68 and the sliding drive plate 63 are compatible.

[0029] There are four positioning rods arranged in a rectangular array at the bottom of the upper mold 2, and the four positioning rods are slidably connected to the adjacent positioning holes 10 respectively.

[0030] Furthermore, any content not described in detail in this specification is existing technology known to those skilled in the art.

[0031] The working principle of this utility model is as follows: First, water is injected into the water tank 3 through the injection port 7. The water pump 83 is started, which allows the water in the water tank 3 to be injected into the second cooling pipe 82 through the water inlet pipe 86. The water flows around the inner wall of the second cooling pipe 82 to cool the upper mold 2. Then the water flows from the hose 84 into the first cooling pipe 81 and flows along the inner wall of the first cooling pipe 81 to cool the mold cavity 9. Then the water flows back into the water tank 3 from the water outlet pipe 85, completing one cooling cycle. Each piece of vacuum forming material can be cooled and flowed once, realizing cyclic cooling. Before demolding, start motor 62 to drive transmission arm 67 to rotate via output shaft. When transmission arm 67 rotates, transmission shaft 68 moves inside sliding transmission plate 63 and drives sliding transmission plate 63 to reciprocate left and right between the surfaces of two limit rods 61. This causes the striking head 66 to strike the mold in the closed state, loosening the thermoforming material and making demolding easier. At the same time, the spring force of spring rod 65 will bounce back to the left to dissipate part of the impact force of striking head 66, providing cushioning.

[0032] 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 process, method, article, or apparatus.

[0033] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A water-cooling device for the mold cavity of a vacuum forming machine, comprising a lower mold (1), an upper mold (2) disposed above it, and a water tank (3), characterized in that: A fixed base (4) is fixedly connected to the left side of the lower mold (1), and a fixed plate (5) is fixedly connected to the top of the fixed base (4). A knocking detachment mechanism (6) is provided on the fixed plate (5). The knocking facilitator (6) includes two limiting rods (61) fixedly connected to one side of the fixed plate (5) and a motor (62) fixedly connected to the front of the fixed plate (5). A sliding transmission plate (63) is slidably connected between the surfaces of the two limiting rods (61). A fixing strip (64) is fixedly connected to the right side of the sliding transmission plate (63). A knocking head (66) is fixedly connected to the fixing strip (64) through a spring rod (65). A transmission arm (67) is fixedly connected to the surface of the output shaft of the motor (62). A transmission shaft (68) is fixedly connected to the inner wall of the transmission arm (67).

2. The water-cooling device for the mold cavity of a vacuum forming machine according to claim 1, characterized in that: The top of the water tank (3) is connected to an injection port (7), and a circulating cooling mechanism (8) is provided between the lower mold (1), the upper mold (2) and the water tank (3).

3. The water-cooling device for the mold cavity of a vacuum forming machine according to claim 2, characterized in that: The circulating cooling mechanism (8) includes a first cooling pipe (81) fixedly connected to the inner wall of the lower mold (1), a second cooling pipe (82) fixedly connected to the inner wall of the upper mold (2), and a water pump (83) set on the top of the water tank (3). The first cooling pipe (81) and the second cooling pipe (82) are connected by a hose (84). The first cooling pipe (81) is connected to the water tank (3) through a water outlet pipe (85). The water pump (83) and the second cooling pipe (82) are connected by a water inlet pipe (86).

4. The water-cooling device for the mold cavity of a vacuum forming machine according to claim 1, characterized in that: The lower mold (1) has a mold cavity (9) at its top, and four positioning holes (10) are provided at the top of the mold cavity (9). The upper mold (2) is fixedly connected to a positioning rod (11) at its bottom.

5. The water-cooling device for the mold cavity of a vacuum forming machine according to claim 1, characterized in that: The drive shaft (68) and the sliding drive plate (63) are adapted to each other.

6. The water-cooling device for the mold cavity of a vacuum forming machine according to claim 4, characterized in that: Four positioning rods (11) are provided and are arranged in a rectangular array at the bottom of the upper mold (2). The four positioning rods are slidably connected to the adjacent positioning holes (10).

Images