Exhaust structure of rotational molding mold

Abstract

The utility model relates to the technical field of rotational molding equipment, in particular to an exhaust structure of a rotational molding mold, which comprises a mold, an adapter, a material injection pipe, a connecting rod and an air inlet pipe. The die is connected with an end cover which communicates with the fixing base. The adapter seat and the fixed seat are rotatably connected and internally communicated with each other. A one-way valve is arranged in the material injection pipe, the material injection pipe communicates with the interior of the mold, and an annular channel is formed between the material injection pipe and the inner wall of the adapter. And the adapter seat is rotationally connected with the gas collecting assembly, so that the gas collecting assembly rotates in a self-adaptive manner under the action of gravity in the swinging process of the mold. The gas inlet pipe communicates with the annular channel and the input end of the gas collecting assembly, and the output end of the gas collecting assembly communicates with the outside. According to the utility model, higher stability is always kept when the mold rotates and swings, so that toxic and harmful gases in waste gas are effectively absorbed and treated while raw materials in the mold are prevented from being discharged along with air.

Description

Technical Field

[0001] The utility model relates to the technical field of rotational molding equipment, in particular to an exhaust structure of a rotational molding mold. Background Art

[0002] Roto-molding, also known as rotational molding, rotational molding, rotational molding, etc., is a thermoplastic hollow molding method. The method is to first add the plastic raw material into the mold, and then the mold is continuously rotated along two vertical axes and heated. Under the action of gravity and heat energy, the plastic raw material in the mold is gradually and evenly coated, melted and adhered to the entire surface of the mold cavity to form the desired shape. The rotational molding mold needs to be equipped with an exhaust structure to discharge the high-pressure air in the mold to avoid bubbles in the product.

[0003] The exhaust structure of the existing rotational molding machine is a simple exhaust pipe or exhaust hole. During the exhaust process, since the mold is in a rotating and swinging state, the raw materials inside the mold are easily discharged from the exhaust pipe or exhaust hole, which not only causes waste but also affects the quality of the product such as the wall thickness. At the same time, the directly discharged gas contains a large amount of toxic and harmful substances. Utility Model Content

[0004] The utility model aims to solve the problems existing in the background technology and proposes a rotomolding mold exhaust structure.

[0005] The technical solution of the utility model is a rotomolding mold exhaust structure, comprising a mold, a detachable mold connected end cover, a through hole is arranged on the end cover, and the outside of the through hole is covered with a fixed seat connected to the inside of the mold.

[0006] The adapter seat is rotatably connected to the fixed seat, and the two are internally communicated.

[0007] The injection pipe has a one-way valve arranged inside, the injection pipe passes through the adapter and is connected with the inside of the mold, and an annular channel is arranged between the outer wall of the injection pipe and the inner wall of the adapter.

[0008] The connecting rod is rotatably connected to the adapter and the gas collecting assembly, so that the gas collecting assembly can adaptively rotate by gravity during the swinging process of the mold.

[0009] And an air intake pipe, the air intake pipe is connected with the annular channel and the input end of the gas collection component, and the output end of the gas collection component is connected with the outside.

[0010] Preferably, the mold is rotatably connected to the bracket, and the bracket is rotatably connected to the frame. A driving component A for driving the mold to rotate is arranged on the bracket, and a driving component B for driving the bracket and the mold to swing is arranged on the frame.

[0011] Preferably, an exhaust hole connected to the annular channel is provided on the adapter, the exhaust hole is located above the annular channel, and the air inlet end of the air inlet pipe is covered on the outside of the exhaust hole.

[0012] Preferably, the gas collecting assembly includes a collecting box and a waste gas treating agent located in the collecting box for absorbing toxic and harmful gases inside the mold.

[0013] Preferably, the waste gas treatment agent is a liquid treatment agent, and a reserved blank area is set between the liquid surface of the liquid treatment agent and the upper wall of the inner cavity of the collection box, and the air inlet pipe is connected to the inside of the collection box. The output end of the collection box is provided with an exhaust pipe connected to the inside thereof, and the pipe mouth of the exhaust pipe is located above the liquid surface.

[0014] Preferably, a plurality of partitions are staggeredly arranged in the collecting box to form a serpentine passage in the collecting box, and the pipe openings of the exhaust pipe and the air inlet pipe are respectively located at two ends of the serpentine passage.

[0015] Preferably, a refrigeration component for cooling the waste gas treatment agent is provided in the collection box, and a feeding pipe and a drain pipe for replacing the waste gas treatment agent are provided on the collection box, and a valve for controlling the internal on-off of the drain pipe is provided in the drain pipe.

[0016] Compared with the prior art, the utility model has the following beneficial technical effects:

[0017] By providing an adapter seat 6 rotatably connected to the fixed seat, the collecting box is prevented from rotating with the mold when the mold rotates; by providing a connecting rod that rotatably connects the adapter seat and the collecting box, the collecting box will not follow the swing of the mold during the swinging process, and the adaptive rotation of the adapter seat allows the collecting box to always keep the directions of the exhaust pipe and the intake pipe unchanged to prevent the exhaust gas absorbent from overflowing. At the same time, this structure can also make the exhaust hole always face upward to prevent the raw materials in the mold from being discharged from the exhaust hole. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the structure of the utility model;

[0019] Figure 2 It is a schematic diagram of the connection structure of various components on the adapter;

[0020] Figure 3 It is a schematic diagram of the connection structure between the fixed seat and the adapter.

[0021] Figure numerals: 1, frame; 2, bracket; 3, mold; 4, end cover; 5, fixing seat; 6, adapter seat; 601, annular channel; 602, exhaust hole; 7, injection pipe; 8, connecting rod; 9, collecting box; 10, exhaust pipe; 11, air inlet pipe; 12, partition; 13, drain pipe; 14, refrigeration assembly. DETAILED DESCRIPTION

[0022] Embodiment 1

[0023] like Figure 1-Figure 3 As shown, a rotomolding mold exhaust structure proposed by the utility model comprises a mold 3, an adapter seat 6, an injection pipe 7, a connecting rod 8 and an air inlet pipe 11. The mold 3 is detachably connected to the end cover 4, and a through hole is arranged on the end cover 4. The outside of the through hole is covered with a fixed seat 5 connected to the inside of the mold 3. The mold 3 is rotatably connected to the bracket 2, and the bracket 2 is rotatably connected to the frame 1. A driving component A for driving the mold 3 to rotate is arranged on the bracket 2, and a driving component B for driving the bracket 2 and the mold 3 to swing is arranged on the frame 1, wherein the driving component A includes but is not limited to a motor A, the motor A is connected to the bracket 2, and the output end of the motor A is connected to the central axis of the base of the mold 3 away from the end cover 4, and the driving component B includes but is not limited to a motor B, the motor B is connected to the frame 1, and the output end of the motor B is connected to the end of the mounting shaft on the bracket 2 for rotatably connecting to the frame 1. The adapter seat 6 is rotatably connected to the fixed seat 5 and is internally connected, and the center of gravity of the adapter seat 6 faces downward, so that it does not rotate with the fixed seat 5 and the mold 3 when they rotate. The adapter 6 is provided with an exhaust hole 602 connected with the annular channel 601, and the exhaust hole 602 is located above the annular channel 601. A one-way valve is provided in the injection pipe 7, and the one-way valve is only turned on when injecting material into the mold 3 along the injection pipe 7. The injection pipe 7 passes through the adapter 6 and is connected with the inside of the mold 3, and an annular channel 601 is provided between the outer wall of the injection pipe 7 and the inner wall of the adapter 6. The connecting rod 8 rotatably connects the adapter 6 and the gas collection assembly, so that the gas collection assembly can rotate adaptively by gravity during the swinging process of the mold 3. The gas collection assembly includes a collection box 9 and an exhaust gas treatment agent located in the collection box 9 for absorbing toxic and harmful gases inside the mold. The exhaust gas treatment agent is a liquid treatment agent, and a reserved blank area is provided between the liquid level of the liquid treatment agent and the upper wall of the inner cavity of the collection box 9, and the air inlet pipe 11 is connected with the inside of the collection box 9. An exhaust pipe 10 connected with the inside of the collection box 9 is provided at the output end of the collection box 9, and the pipe mouth of the exhaust pipe 10 is located above the liquid level. A plurality of partitions 12 are staggered in the collecting box 9 to form a serpentine channel in the collecting box 9. The outlets of the exhaust pipe 10 and the intake pipe 11 are located at the two ends of the serpentine channel respectively. A feeding pipe and a drain pipe 13 for replacing the exhaust gas treatment agent are provided on the collecting box 9. A valve for controlling the internal on-off of the drain pipe 13 is provided in the drain pipe 13. The intake end of the intake pipe 11 is covered on the outside of the exhaust hole 602, and the output end of the intake pipe 11 is connected to the input end of the gas collecting assembly, and the output end of the gas collecting assembly is connected to the outside.

[0024] In this embodiment, the high-temperature fluid material is injected into the mold 3 through the injection pipe 7. At this time, the mold 3 is hot, the air expands, and the excess air enters the collection box 9 along the annular channel 601 and the air inlet pipe 11. The gas is discharged through the exhaust pipe 10 after the harmful components are absorbed by the exhaust gas treatment agent. Then the rotational molding process is entered, and the drive assembly A and the drive assembly B are started and drive the mold 3 to rotate and swing. During the rotation process, since the center of gravity of the adapter 6 is downward and rotates with the fixed seat 5, the adapter 6 will not rotate with the mold 3, so that the exhaust hole 602 is always facing upward, and the raw materials in the mold 3 will not be discharged along the exhaust hole 602. During the swinging process of the mold 3, since the collection box 9 and the adapter 6 are connected by the connecting rod 8, they will not swing with the swinging of the mold 3 due to their own gravity, so that the pipe mouth of the exhaust pipe 10 is always located above the liquid surface, thereby ensuring the high efficiency of exhaust gas absorption and preventing the exhaust gas treatment agent from overflowing.

[0025] Embodiment 2

[0026] like Figure 1 and Figure 2 As shown, the utility model proposes a rotational molding mold exhaust structure. Compared with the first embodiment, a refrigeration component 14 for cooling the exhaust gas treatment agent is arranged in the collection box 9. The refrigeration component 14 includes but is not limited to a semiconductor refrigerator. The cold end of the semiconductor refrigerator is connected to a heat conducting plate. The heat conducting plate is inserted into the collection box 9 and is located below the liquid surface.

[0027] In this embodiment, since the temperature of the gas output by the mold 3 to the collecting box 9 is very high, the heat exchange between the high-temperature gas and the waste gas treatment agent causes the temperature of the waste gas treatment agent to rise rapidly. When the temperature of the waste gas treatment agent exceeds a certain level, its ability to absorb gas is reduced. At this time, the semiconductor refrigerator in the refrigeration component 14 is used for cooling. When the semiconductor refrigerator is working, the temperature of the cold end drops rapidly, and the low temperature is conducted to the heat conduction plate. Subsequently, the heat conduction plate exchanges heat with the waste gas treatment agent, thereby achieving the purpose of cooling the waste gas treatment agent. At the same time, the waste gas after cooling is discharged along the exhaust pipe 10 after the toxic and harmful components are absorbed by the waste gas treatment agent. At this time, the temperature of the discharged gas is relatively low and will not cause burns to the staff.

[0028] The implementation modes of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited thereto, and various changes can be made within the knowledge scope of technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. A rotomolding mold exhaust structure, characterized in that: include A mold (3), the mold (3) being detachably connected to an end cover (4), a through hole being arranged on the end cover (4), and a fixing seat (5) being arranged outside the through hole and communicating with the inside of the mold (3); The adapter seat (6) is rotatably connected to the fixed seat (5), and the two are internally communicated; An injection pipe (7), a one-way valve is arranged in the injection pipe (7), the injection pipe (7) passes through the adapter seat (6) and is connected to the inside of the mold (3), and an annular channel (601) is arranged between the outer wall of the injection pipe (7) and the inner wall of the adapter seat (6); A connecting rod (8), the connecting rod (8) rotatably connects the adapter seat (6) and the gas collection assembly, so that the gas collection assembly can rotate adaptively by gravity during the swinging process of the mold (3); and an air inlet pipe (11), wherein the air inlet pipe (11) is connected to the annular channel (601) and the input end of the gas collection component, and the output end of the gas collection component is connected to the outside.

2. A rotomolding mold exhaust structure according to claim 1, characterized in that: The mold (3) is rotatably connected to the bracket (2), and the bracket (2) is rotatably connected to the frame (1); a driving component A for driving the mold (3) to rotate is arranged on the bracket (2), and a driving component B for driving the bracket (2) and the mold (3) to swing is arranged on the frame (1).

3. A rotomolding mold exhaust structure according to claim 1, characterized in that: An exhaust hole (602) in communication with the annular channel (601) is provided on the adapter seat (6); the exhaust hole (602) is located above the annular channel (601); and the air inlet end of the air inlet pipe (11) is covered on the outside of the exhaust hole (602).

4. A rotomolding mold exhaust structure according to claim 1, characterized in that: The gas collection component comprises a collection box (9) and a waste gas treatment agent located in the collection box (9) and used for absorbing toxic and harmful gases inside the mold.

5. A rotomolding mold exhaust structure according to claim 4, characterized in that: The waste gas treatment agent is a liquid treatment agent, and a reserved blank area is provided between the liquid surface of the liquid treatment agent and the upper wall of the inner cavity of the collection box (9), and the air inlet pipe (11) is connected to the inside of the collection box (9); the output end of the collection box (9) is provided with an exhaust pipe (10) connected to the inside thereof, and the pipe mouth of the exhaust pipe (10) is located above the liquid surface.

6. A rotomolding mold exhaust structure according to claim 5, characterized in that: A plurality of partitions (12) are arranged in a staggered manner in the collecting box (9) to form a serpentine channel in the collecting box (9), and the pipe openings of the exhaust pipe (10) and the air intake pipe (11) are respectively located at two ends of the serpentine channel.

7. A rotomolding mold exhaust structure according to claim 6, characterized in that: A refrigeration assembly (14) for cooling the waste gas treatment agent is arranged in the collection box (9), and a feeding pipe and a drain pipe (13) for replacing the waste gas treatment agent are arranged on the collection box (9), and a valve for controlling the on-off of the drain pipe (13) is arranged in the drain pipe (13).

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