Cooling demolding device for injection molding of PET plastic bottle

Abstract

The utility model discloses a cooling demolding device for injection molding of PET plastic bottles. The cooling demolding device for injection molding of the PET plastic bottles comprises a fixing frame, a fixing plate is fixedly connected to the bottom of the fixing frame, a hydraulic cylinder is arranged on the surface of the fixing plate, a driving shaft of the hydraulic cylinder is fixedly connected with a mold base, the cooling demolding device for injection molding of the PET plastic bottles further comprises a mold cavity, and the mold cavity is detachably installed in the mold base. According to the scheme, by rotating the first communicating cavity, the sleeving ring can be connected with the liquid inlet end and the liquid outlet end through threads, the liquid passing pipe can be connected to the interior of the liquid inlet end in a sleeving mode, then the communicating end is connected with a container containing cooling liquid, and the cooling liquid is pumped out through an extraction pump to be fed into a flow channel in a mold cavity; according to the blow molding device, the cooling liquid is arranged to be recycled, so that the blow-molded parison can be quickly cooled through a cooling liquid cooling mode, the time required by natural cooling is effectively shortened, the shaping quality of the blow-molded parison is ensured, and the effect of improving the practicability of the device is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of cooling and demoulding devices, and more specifically to a cooling and demoulding device for PET plastic bottle injection molding. Background Art

[0002] In the process of PET plastic bottle production, blow molding is often required. Blow molding generally uses gas pressure to inflate the hot melt parison closed in the mold to form a hollow product. However, there are still some problems in the actual processing process, such as: hot air passes through the blowing head to form a parison, so that the parison expands to the same size as the mold shape, and then the mold is separated, and the parison is demolded after natural cooling. However, in the natural cooling process, on the one hand, the cooling speed is slow, which is easy to increase the production cycle and reduce the efficiency of plastic bottle production. On the other hand, the temperature distribution inside and on the surface of the parison is uneven, which is easy to cause stress concentration inside the parison or cause its shape to be uneven, thereby affecting the quality of the blow-molded product and reducing the practicality of the demolding device to a certain extent. Utility Model Content

[0003] In order to overcome the above-mentioned defects of the prior art, an embodiment of the utility model provides a cooling demoulding device for PET plastic bottle injection molding to solve the problem that natural cooling of the molded blank before demoulding in the prior art easily affects production efficiency and finished product quality.

[0004] In order to solve the above technical problems, the utility model provides the following technical solutions: a cooling and demoulding device for PET plastic bottle injection molding, comprising a fixed frame, a fixed plate is fixedly connected to the bottom of the fixed frame, a hydraulic cylinder is arranged on the surface of the fixed plate, and a driving shaft of the hydraulic cylinder is fixedly connected to a mold base, and the cooling and demoulding device for PET plastic bottle injection molding also includes

[0005] A mold cavity, the mold cavity is detachably mounted inside the mold base, and a liquid inlet end and a liquid outlet end are respectively arranged on two sides of the bottom of the mold cavity;

[0006] A connecting chamber 1, wherein the bottom of the inner chamber of the connecting chamber 1 is fixedly connected with a liquid passage tube, the top of the liquid passage tube is sleeved with the inside of the liquid inlet end and the liquid outlet end, and a sleeve ring is provided on the top of the connecting chamber 1, and the inner wall of the sleeve ring is threadedly connected with the surface of the liquid inlet end and the liquid outlet end;

[0007] A rotating end, the rotating end is rotatably connected to the bottom of the connecting chamber, the bottom end of the rotating end is fixedly connected to a connecting pipe, the number of the connecting pipes is four, the four connecting pipes are equally divided into two groups, and the bottom end of one group of connecting pipes is fixedly connected to a connecting end.

[0008] Among them, it also includes a second connecting chamber, a transfer chamber, a filter screen, and a third connecting chamber. The second connecting chamber is fixedly connected to the bottom end of another group of connecting pipes, the transfer chamber is threadedly connected to the surface of the second connecting chamber, the filter screen is arranged at the bottom of the inner cavity of the transfer chamber, the bottom of the second connecting chamber is connected to the transfer chamber, and the third connecting chamber is fixedly connected to the bottom of the transfer chamber.

[0009] It also includes a clamping component, which is arranged on one side in the width direction of the mold base.

[0010] Among them, the fixing assembly includes a mounting plate, a sliding plate, a support plate, a limiting rod, a connecting frame, a flip plate, and a fastening ring. The mounting plate is fixedly connected to one side in the width direction of the mold base, the surface of the sliding plate is slidably connected to the side of the mounting plate, one side in the length direction of the sliding plate is fixedly connected to the surface of the supporting plate, the side of the support plate away from the sliding plate is in contact with the bottom of the mold cavity, the limiting rod is fixedly connected to the side of the sliding plate surface opposite to the support plate, the surface of the limiting rod is slidably connected to the inside of the mounting plate, the connecting frame is fixedly connected to the bottom of the mounting plate, one end of the flip plate is rotatably connected to the surface of the connecting frame, and the fastening ring is arranged on the top of the flip plate, and the surface of the fastening ring abuts against the surface of the sliding plate.

[0011] The beneficial effects of the above technical solution of the utility model are as follows:

[0012] In the above scheme, by rotating the connecting cavity one, the sleeve ring can be connected to the liquid inlet end and the liquid outlet end through the thread, and the liquid pipe can be sleeved to the inside of the liquid inlet end, and then the connecting end is connected to the container filled with coolant, and the coolant is extracted by the extraction pump to be sent to the flow channel inside the mold cavity. Under the continuous flow of the coolant, the mold cavity can be cooled as a whole, so that the preform after blow molding in the mold cavity can be quickly cooled. In addition, the corresponding container is connected to the bottom of the connecting cavity three, so that the coolant can be discharged through the liquid outlet end and filtered through the filter net, and can be collected for recycling. Therefore, the blow-molded preform can be quickly cooled by cooling the coolant, which effectively shortens the time required for natural cooling and ensures the shaping quality of the preform after blow molding, thereby achieving the effect of improving the practicality of the device;

[0013] By supporting the bottom of the mold cavity with the support plate and abutting the one side of the support plate with the fastening ring, the mold cavity can be more firmly placed inside the mold base, avoiding accidental loosening or falling of the mold cavity during separation and demoulding of the mold base, thereby ensuring that the processing can proceed normally. When the mold cavity needs to be disassembled, the fastening ring is separated from the surface of the sliding plate by flipping the flip plate, and then the sliding plate is moved horizontally to move the support plate away from the bottom of the mold cavity, thereby facilitating the disassembly of the mold cavity. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0015] Figure 2 It is a three-dimensional assembly diagram of the overall device of the utility model;

[0016] Figure 3 This is a schematic diagram of the transfer chamber and filter related structures of the utility model;

[0017] Figure 4 It is a schematic diagram of the structure of the clamping assembly of the utility model.

[0018] [reference numerals]

[0019] 1. Fixed frame; 2. Fixed plate; 3. Hydraulic cylinder; 4. Mold base; 5. Mold cavity; 6. Liquid inlet end; 7. Liquid outlet end; 8. Connecting cavity 1; 9. Liquid passage pipe; 10. Sleeve ring; 11. Rotating end; 12. Connecting pipe; 13. Connecting end; 14. Connecting cavity 2; 15. Transfer cavity; 16. Filter screen; 17. Connecting cavity 3; 18. Fixing assembly; 181. Mounting plate; 182. Sliding plate; 183. Support plate; 184. Limit rod; 185. Connecting frame; 186. Flip plate; 187. Fastening ring. DETAILED DESCRIPTION

[0020] In order to make the technical problems to be solved, technical solutions and advantages of the present invention more clear, a detailed description will be given below in conjunction with the accompanying drawings and specific embodiments.

[0021] As attached Figure 1 To Attachment Figure 4 The embodiment of the utility model provides a cooling and demoulding device for PET plastic bottle injection molding, comprising a fixing frame 1, a fixing plate 2 is fixedly connected to the bottom of the fixing frame 1, a hydraulic cylinder 3 is arranged on the surface of the fixing plate 2, a driving shaft of the hydraulic cylinder 3 is fixedly connected to a mold base 4, and the cooling and demoulding device for PET plastic bottle injection molding also includes

[0022] The mold cavity 5 is detachably mounted inside the mold base 4. A liquid inlet 6 and a liquid outlet 7 are respectively arranged on both sides of the bottom of the mold cavity 5. A flow channel is provided inside the mold cavity 5 for the circulation of cooling liquid. Meanwhile, the mold cavity 5 itself has a fast temperature transfer speed, so that the internal preform can be quickly cooled.

[0023] A connecting cavity 8, the bottom of the inner cavity of the connecting cavity 8 is fixedly connected with a liquid through pipe 9, the top of the liquid through pipe 9 is sleeved with the inside of the liquid inlet end 6 and the liquid outlet end 7, and a sleeve ring 10 is provided on the top of the connecting cavity 8, and the inner wall of the sleeve ring 10 is threadedly connected with the surface of the liquid inlet end 6 and the liquid outlet end 7;

[0024] The rotating end 11 is rotatably connected to the bottom of the connecting chamber 8. The bottom end of the rotating end 11 is fixedly connected to a connecting pipe 12. There are four connecting pipes 12. The four connecting pipes 12 are equally divided into two groups. The bottom end of one group of connecting pipes 12 is fixedly connected to a connecting end 13.

[0025] It also includes a second connecting chamber 14, a transfer chamber 15, a filter screen 16, and a third connecting chamber 17. The second connecting chamber 14 is fixedly connected to the bottom end of another group of connecting pipes 12. The transfer chamber 15 is threadedly connected to the surface of the second connecting chamber 14. The filter screen 16 is arranged at the bottom of the inner cavity of the transfer chamber 15. The bottom of the second connecting chamber 14 is connected to the transfer chamber 15. The third connecting chamber 17 is fixedly connected to the bottom of the transfer chamber 15.

[0026] It also includes a fixing component 18 which is arranged on one side of the mold base 4 in the width direction.

[0027] The clamping assembly 18 includes a mounting plate 181, a sliding plate 182, a support plate 183, a limiting rod 184, a connecting frame 185, a flip plate 186, and a fastening ring 187. The mounting plate 181 is fixedly connected to one side of the mold base 4 in the width direction. The surface of the sliding plate 182 is slidably connected to the side of the mounting plate 181. One side of the sliding plate 182 in the length direction is fixedly connected to the surface of the support plate 183. The side of the support plate 183 away from the sliding plate 182 is in contact with the bottom of the mold cavity 5. The limiting rod 184 is fixedly connected to the side of the sliding plate 182 surface relative to the support plate 183. The limiting rod 186 is fixedly connected to the side of the sliding plate 182 surface relative to the support plate 183. The surface of 84 is slidably connected to the inside of the mounting plate 181, the connecting frame 185 is fixedly connected to the bottom of the mounting plate 181, one end of the flip plate 186 is rotatably connected to the surface of the connecting frame 185, and the fastening ring 187 is arranged on the top of the flip plate 186, and the surface of the fastening ring 187 abuts against the surface of the sliding plate 182. Through the setting of the flip plate 186, there is a large friction force at the connection between it and the connecting frame 185, which can play a certain positioning role, so that the position of the flip plate 186 can be fixed after it is flipped, so as to abut the fastening ring 187 against the sliding plate 182.

[0028] The working process of the utility model is as follows: by rotating the connecting cavity 1 8, the sleeve ring 10 can be connected to the liquid inlet end 6 and the liquid outlet end 7 through threads, and the liquid pipe 9 can be sleeved to the inside of the liquid inlet end 6, and then the connecting end 13 is connected to the container filled with coolant, and the coolant is extracted by using an extraction pump to be sent into the flow channel inside the mold cavity 5. Under the continuous flow of the coolant, the mold cavity 5 can be cooled as a whole, so that the blow-molded preform in the mold cavity 5 can be quickly cooled, and the preform can be demolded after cooling. In addition, a corresponding container is connected to the bottom of the connecting cavity 3 17, so that the coolant can be discharged through the liquid outlet end 7 and filtered through the filter net 16, and can be collected for recycling.

[0029] Finally, a few points should be explained: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, which may refer to mechanical connection or electrical connection, or internal communication between two components, or direct connection. "upper", "lower", "left", "right", etc. are only used to indicate relative positional relationships. When the absolute position of the object being described changes, the relative positional relationship may change;

[0030] Secondly: In the drawings of the embodiments disclosed in the present utility model, only the structures related to the embodiments disclosed in the present utility model are involved, and other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of the present utility model can be combined with each other;

[0031] Finally: The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present utility model should be included in the protection scope of the present utility model.

Claims

1. A cooling and demoulding device for PET plastic bottle injection molding, comprising a fixed frame (1), the bottom of the fixed frame (1) is fixedly connected to a fixed plate (2), the surface of the fixed plate (2) is provided with a hydraulic cylinder (3), the driving shaft of the hydraulic cylinder (3) is fixedly connected to a mold base (4), characterized in that: The cooling and demoulding device for PET plastic bottle injection molding also includes A mold cavity (5), wherein the mold cavity (5) is detachably mounted inside the mold base (4), and a liquid inlet end (6) and a liquid outlet end (7) are respectively arranged on two sides of the bottom of the mold cavity (5); A connecting chamber (8), wherein the bottom of the inner cavity of the connecting chamber (8) is fixedly connected with a liquid passage tube (9), the top end of the liquid passage tube (9) is sleeved with the inside of the liquid inlet end (6) and the liquid outlet end (7), and a sleeve ring (10) is provided at the top of the connecting chamber (8), and the inner wall of the sleeve ring (10) is threadedly connected with the surface of the liquid inlet end (6) and the liquid outlet end (7); A rotating end (11), the rotating end (11) is rotatably connected to the bottom of the connecting chamber (8), the bottom end of the rotating end (11) is fixedly connected to a connecting pipe (12), the number of the connecting pipes (12) is four, the four connecting pipes (12) are equally divided into two groups, and the bottom end of one group of connecting pipes (12) is fixedly connected to a connecting end (13).

2. The cooling and demoulding device for PET plastic bottle injection molding according to claim 1, characterized in that: It also comprises a second connecting chamber (14), a transfer chamber (15), a filter screen (16), and a third connecting chamber (17); the second connecting chamber (14) is fixedly connected to the bottom end of another group of connecting pipes (12); the transfer chamber (15) is threadedly connected to the surface of the second connecting chamber (14); the filter screen (16) is arranged at the bottom of the inner cavity of the transfer chamber (15); the bottom of the second connecting chamber (14) is connected to the transfer chamber (15); and the third connecting chamber (17) is fixedly connected to the bottom of the transfer chamber (15).

3. The cooling and demoulding device for PET plastic bottle injection molding according to claim 1, characterized in that: It also comprises a fixing component (18), wherein the fixing component (18) is arranged on one side in the width direction of the mold base (4).

4. The cooling and demoulding device for PET plastic bottle injection molding according to claim 3, characterized in that: The clamping assembly (18) comprises a mounting plate (181), a sliding plate (182), a support plate (183), a limiting rod (184), a connecting frame (185), a flip plate (186), and a fastening ring (187); the mounting plate (181) is fixedly connected to one side of the mold base (4) in the width direction; the surface of the sliding plate (182) is slidably connected to the side of the mounting plate (181); one side of the sliding plate (182) in the length direction is fixedly connected to the surface of the support plate (183); and the side of the support plate (183) away from the sliding plate (182) is connected to the mold base (4). The bottom of the cavity (5) is in contact with the bottom of the cavity (5), the limiting rod (184) is fixedly connected to the side of the sliding plate (182) surface opposite to the supporting plate (183), the surface of the limiting rod (184) is slidably connected to the inside of the mounting plate (181), the connecting frame (185) is fixedly connected to the bottom of the mounting plate (181), one end of the flip plate (186) is rotatably connected to the surface of the connecting frame (185), and the fastening ring (187) is arranged on the top of the flip plate (186), and the surface of the fastening ring (187) is in contact with the surface of the sliding plate (182).

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