Multi-level cooling channel die lip mechanism for fast multi-cavity preform injection mold

Abstract

The utility model belongs to the field of mold technology, and particularly relates to a multi-level cooling water channel die lip mechanism of a fast multi-cavity bottle embryo injection mold. The utility model includes a fixed plate and a hot runner mounting plate, and the fixed plate is provided with an injection main nozzle. The utility model can heat the upper and lower sides of the diverter plate through a temperature-controlled heating element to ensure that the temperature difference between the material and the diverter plate is not too large during injection diversion, ensure the molten state of the material, avoid agglomeration during diversion, and improve the uniformity of injection molding. After the injection molding is completed, the cooling water can be passed into the multi-cavity cooling part, and the die lip structure at the bottom of the bottle embryo injection molded part can be cooled through the multi-cavity cooling part. By adopting large-area circulating cooling, the outlet of each bottle embryo injection molded part can be quickly cooled, and the cooling effect is good, and the cooling dead corner is avoided. The temperature-controlled heating element can cooperate with the multi-cavity cooling part to achieve multi-level cooling and improve the cooling efficiency.

Description

Technical Field

[0001] The utility model belongs to the technical field of molds and relates to a multi-level cooling water channel mold lip mechanism of a fast multi-cavity bottle embryo injection mold. Background Art

[0002] At present, in the die lips of PET (polyethylene terephthalate) injection molds used for fast multi-cavity, an integrated structure design is generally adopted, and various cooling water channels are formed by drilling holes from different positions and angles. During use, the outlet position of the die lip is difficult to drill holes into cooling water channels at its outlet due to its small structure. Therefore, it is difficult to quickly cool the outlet of the die lip after the injection molding is completed, and the injection molding manifold also lacks a corresponding temperature control structure, making it difficult to achieve multi-level cooling, and cooling dead corners are prone to occur, and the cooling effect is relatively general. Therefore, it is urgent to design a multi-level cooling water channel die lip mechanism for a fast multi-cavity bottle preform injection mold that can overcome the above defects.

[0003] In order to overcome the shortcomings of the prior art, people have proposed various solutions through continuous exploration. For example, a Chinese patent discloses a preform mold lip cooling structure [application number: 202022838926.1], which includes two half-lip parts arranged in a mirror-symmetrical manner, and the two half-lip parts are spliced ​​to form a lip body. The middle part of the lip body is provided with a hollow molding surface for preform molding. A multi-level cooling water channel structure is axially arranged in the preform lip body, and the cooling water channel of the lip plate adopts a linear water channel structure, while the cooling water channel of the second hollow cylinder adopts an arc-shaped water channel structure. The overall cooling water channel has improved shape and penetrates into the second hollow cylinder to be closer to the screw thread. Utility Model Content

[0004] The utility model aims to solve the above problems and provides a multi-level cooling water channel die lip mechanism for a fast multi-cavity preform injection mold.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A fast multi-cavity preform injection mold with a multi-level cooling water channel lip mechanism comprises a fixed plate and a hot runner mounting plate, wherein a main injection nozzle is arranged in the fixed plate, a diverter plate is arranged in the hot runner mounting plate, the main injection nozzle is connected to the diverter plate, a plurality of nozzle seats are arranged at the bottom of the diverter plate, a preform injection molding part is arranged in the nozzle seats, a multi-cavity cooling part is arranged at the bottom of the hot runner mounting plate, the bottom of the nozzle seat extends into the multi-cavity cooling part, a temperature control heating element is embedded in the diverter plate, and the temperature control heating element and the main injection nozzle are arranged alternately.

[0007] In the above-mentioned multi-level cooling water channel lip mechanism of the rapid multi-cavity preform injection mold, the multi-cavity cooling part includes a plurality of nozzle cooling cavities arranged at the bottom of the hot runner mounting plate, the positions of the preform injection molded parts and the nozzle cooling cavities correspond, and a circulation connection part is provided in the hot runner mounting plate, and the circulation connection part is communicated with the nozzle cooling cavities.

[0008] In the above-mentioned multi-level cooling water channel mold lip mechanism of the rapid multi-cavity preform injection mold, the circulation connection part includes a circulation connection groove arranged in the hot runner mounting plate, and a connecting channel is provided between the circulation connection groove and the nozzle cooling cavity, and one end of the connecting channel is connected to the circulation connection groove, and the other end is connected to the nozzle cooling cavity.

[0009] In the above-mentioned multi-level cooling water channel lip mechanism of the rapid multi-cavity preform injection mold, a water inlet channel and a water outlet channel are opened on the side of the circulation connection groove, and the water inlet channel and the water outlet channel are parallel to each other.

[0010] In the above-mentioned multi-level cooling water channel mold lip mechanism of the rapid multi-cavity preform injection mold, the temperature control heating element includes a manifold plate heating tube arranged in the manifold plate, and the manifold plate heating tube is staggered with the injection main nozzle.

[0011] In the above-mentioned multi-level cooling water channel die lip mechanism of the rapid multi-cavity preform injection mold, a junction box is provided on the side of the hot runner mounting plate, and the junction box is electrically connected to the heating tube of the manifold plate.

[0012] In the above-mentioned multi-level cooling water channel lip mechanism of the rapid multi-cavity preform injection mold, the preform injection molded part includes a beryllium copper nozzle and a valve needle arranged in a nozzle seat.

[0013] In the above-mentioned multi-level cooling water channel mold lip mechanism of the rapid multi-cavity preform injection mold, a heat insulation cap is provided between the beryllium copper nozzle and the nozzle seat.

[0014] In the above-mentioned multi-level cooling water channel mold lip mechanism of the rapid multi-cavity preform injection mold, a main nozzle heating coil is sleeved on the injection main nozzle.

[0015] In the above-mentioned multi-level cooling water channel mold lip mechanism of the rapid multi-cavity preform injection mold, a valve needle pressing block and a piston are arranged in the fixed plate, and the piston is connected to the valve needle.

[0016] Compared with the existing technology, the advantages of the utility model are:

[0017] 1. In the injection molding process of the utility model, the molten material is injected into the manifold plate through the injection main nozzle, and then flows into the preform injection molded part after being diverted by the manifold plate, so as to perform multi-cavity synchronous injection molding of the preform plastic part. The upper and lower sides of the manifold plate can be heated by the temperature-controlled heating element to ensure that the temperature difference between the material and the manifold plate is not too large during injection diversion, thereby ensuring the molten state of the material, avoiding agglomeration during diversion, and improving the uniformity of injection molding. After the injection molding is completed, the cooling water can be introduced into the multi-cavity cooling part, and the die lip structure at the bottom of the preform injection molded part can be cooled by the multi-cavity cooling part. By adopting large-area circulating cooling, the outlet of each preform injection molded part can be quickly cooled, and the cooling effect is good, so as to avoid the cooling dead corner, and the temperature-controlled heating element can cooperate with the multi-cavity cooling part to realize multi-level cooling, thereby improving the cooling efficiency.

[0018] 2. After the injection molding is completed, the utility model can allow the cooling water inlet channel to enter the circulation connection groove, and then enter the nozzle cooling cavity through the interconnecting connection channel for cooling. The large-area circulation cooling is adopted, and the outlet of each preform injection molded part can be quickly cooled, with good cooling effect, avoiding the occurrence of cooling dead corners. After the cooling is completed, the cooling water is discharged through the water outlet channel to achieve rapid water replacement.

[0019] Other advantages, objectives and features of the present invention will be embodied in part through the following description, and in part will be understood by those skilled in the art through research and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of the utility model.

[0021] Figure 2 It is a structural schematic diagram of the utility model in another direction.

[0022] Figure 3 It is a partial structural schematic diagram of the utility model.

[0023] Figure 4 It is a partial structural schematic diagram of the utility model in another direction.

[0024] In the figure: fixing plate 1, hot runner mounting plate 2, injection main nozzle 3, manifold plate 4, nozzle seat 5, preform injection molding part 6, multi-cavity cooling part 7, temperature control heating part 8, nozzle cooling cavity 9, circulation connection part 10, circulation connection groove 11, interconnecting connection channel 12, water inlet channel 13, water outlet channel 14, manifold plate heating tube 15, junction box 16, beryllium copper nozzle 17, valve needle 18, insulation cap 19, main nozzle heating coil 20, valve needle pressure block 21, piston 22. DETAILED DESCRIPTION

[0025] The utility model is further described below in conjunction with the accompanying drawings.

[0026] like Figure 1-4 As shown, a multi-level cooling water channel lip mechanism of a fast multi-cavity preform injection mold comprises a fixed plate 1 and a hot runner mounting plate 2, wherein the fixed plate 1 is provided with an injection main nozzle 3, the hot runner mounting plate 2 is provided with a diverter plate 4, the injection main nozzle 3 is connected to the diverter plate 4, a plurality of nozzle seats 5 are provided at the bottom of the diverter plate 4, a preform injection molding part 6 is provided in the nozzle seats 5, a multi-cavity cooling part 7 is provided at the bottom of the hot runner mounting plate 2, the bottom of the nozzle seat 5 extends into the multi-cavity cooling part 7, a temperature control heating element 8 is embedded in the diverter plate 4, and the temperature control heating element 8 is staggered with the injection main nozzle 3.

[0027] In this embodiment, during the injection molding process, the molten material is injected into the manifold plate 4 through the injection molding main nozzle 3, and flows into the bottle embryo injection molded part 6 after being diverted by the manifold plate 4, and multi-cavity synchronous injection molding of the bottle embryo plastic part is carried out. The upper and lower sides of the manifold plate 4 can be heated by the temperature control heating element 8 to ensure that the temperature difference between the material and the manifold plate 4 is not too large during injection diversion, to ensure the molten state of the material, to avoid agglomeration during diversion, and to improve the uniformity of injection molding. After the injection molding is completed, the cooling water can be passed into the multi-cavity cooling part 7, and the mold lip structure at the bottom of the bottle embryo injection molded part 6 can be cooled by the multi-cavity cooling part 7. By adopting large-area circulating cooling, the outlet of each bottle embryo injection molded part 6 can be quickly cooled, and the cooling effect is good, and the cooling dead corner is avoided. The temperature control heating element 8 can cooperate with the multi-cavity cooling part 7 to achieve multi-level cooling and improve the cooling efficiency.

[0028] Combination Figure 1-4 As shown, the multi-cavity cooling part 7 includes a plurality of nozzle cooling cavities 9 arranged at the bottom of the hot runner mounting plate 2, the position of the preform injection molding part 6 corresponds to the nozzle cooling cavity 9, and a circulation connection part 10 is provided in the hot runner mounting plate 2, and the circulation connection part 10 is connected to the nozzle cooling cavity 9.

[0029] Specifically, after the injection molding is completed, cooling water can be introduced into the nozzle cooling cavity 9, and the mold lip structure at the bottom of the bottle embryo injection molded part 6 can be cooled through the nozzle cooling cavity 9. The circulation connection part 10 can circulate the cooling water to achieve rapid water replacement. By adopting large-area circulation cooling, the outlet of each bottle embryo injection molded part 6 can be quickly cooled, and the cooling effect is good, avoiding the occurrence of cooling dead corners.

[0030] The circulation connection part 10 includes a circulation connection groove 11 arranged in the hot runner mounting plate 2, and a connecting channel 12 is provided between the circulation connection groove 11 and the nozzle cooling cavity 9. One end of the connecting channel 12 is connected to the circulation connection groove 11, and the other end is connected to the nozzle cooling cavity 9. A water inlet channel 13 and a water outlet channel 14 are opened on the side of the circulation connection groove 11, and the water inlet channel 13 and the water outlet channel 14 are parallel to each other.

[0031] In this embodiment, after the injection molding is completed, the cooling water can be introduced into the circulation connection groove 11 through the cooling water inlet channel 13, and then enter the nozzle cooling cavity 9 through the interconnecting connection channel 12 for cooling. By adopting large-area circulation cooling, the outlet of each preform injection molded part 6 can be quickly cooled, and the cooling effect is good, and the cooling dead corner is avoided. The cooling water after cooling is discharged through the water outlet channel 14 to achieve rapid water replacement.

[0032] The temperature control heating element 8 includes a manifold plate heating tube 15 disposed in the manifold plate 4 , and the manifold plate heating tube 15 is staggered with the injection main nozzle 3 .

[0033] In this embodiment, during the injection molding process, the upper and lower sides of the manifold plate 4 are heated by the manifold plate heating tubes 15 embedded in the upper and lower parts to ensure that the temperature difference between the material and the manifold plate 4 is not too large during injection molding diversion, thereby ensuring the molten state of the material, avoiding agglomeration during diversion, and improving the uniformity of injection molding.

[0034] Combination Figure 1 As shown, a junction box 16 is provided on the side of the hot runner mounting plate 2 , and the junction box 16 is electrically connected to the heating tube 15 of the manifold plate.

[0035] In this embodiment, the junction box 16 is connected to an external power source to supply power to the manifold plate heating tube 15 .

[0036] The preform injection molded part 6 includes a beryllium copper nozzle 17 and a valve needle 18 arranged in a nozzle seat 5, a heat insulation cap 19 is provided between the beryllium copper nozzle 17 and the nozzle seat 5, a valve needle pressing block 21 and a piston 22 are provided in the fixing plate 1, and the piston 22 is connected to the valve needle 18.

[0037] In this embodiment, during injection molding, injection molding can be performed through the beryllium copper nozzle 17 of the nozzle seat 5, the valve needle pressing block 21 and the piston 22 are used to control the valve needle 18, and the heat insulation cap 19 plays a role of heat insulation.

[0038] Combination Figure 1-3 As shown, the injection main nozzle 3 is provided with a main nozzle heating coil 20.

[0039] In this embodiment, the main nozzle heating ring 20 can heat the outer ring of the injection main nozzle 3 to prevent the material from cooling in the main flow channel.

[0040] The working principle of the utility model is:

[0041] During the injection molding process, the molten material is injected into the manifold plate 4 through the injection main nozzle 3, and then flows into the preform injection molded part 6 after being diverted by the manifold plate 4, and the preform injection molded part is subjected to multi-cavity synchronous injection molding. The upper and lower sides of the manifold plate 4 are heated by the manifold plate heating tube 15 embedded in the upper and lower parts to ensure that the temperature difference between the material and the manifold plate 4 is not too large during injection diversion, to ensure the molten state of the material, to avoid agglomeration during diversion, and to improve the uniformity of injection molding. After the injection molding is completed, the cooling water inlet channel 13 can enter the circulation connection groove 11, and then enter the nozzle cooling cavity 9 through the interconnecting connection channel 12 for cooling. By adopting large-area circulation cooling, the outlet of each preform injection molded part 6 can be quickly cooled, the cooling effect is good, and the cooling dead corner is avoided. The cooling water after cooling is discharged through the water outlet channel 14 to achieve rapid water replacement. The junction box 16 is connected to an external power supply to power the manifold plate heating tube 15.

[0042] During injection molding, injection molding can be performed through the beryllium copper nozzle 17 of the nozzle seat 5. The valve needle pressure block 21 and the piston 22 are used to control the valve needle 18. The heat insulation cap 19 plays a role of heat insulation. The main nozzle heating coil 20 can heat the outer ring of the injection main nozzle 3 to prevent the material from cooling in the main channel.

[0043] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways without departing from the spirit of the present invention.

[0044] Although this article uses more terms such as fixed plate 1, hot runner mounting plate 2, injection main nozzle 3, manifold plate 4, nozzle seat 5, preform injection molded part 6, multi-cavity cooling part 7, temperature control heating element 8, nozzle cooling cavity 9, circulation connection part 10, circulation connection groove 11, interconnecting connection channel 12, water inlet channel 13, water outlet channel 14, manifold plate heating pipe 15, junction box 16, beryllium copper nozzle 17, valve needle 18, insulation cap 19, main nozzle heating coil 20, valve needle pressing block 21, piston 22, etc., it does not exclude the possibility of using other terms. The use of these terms is only for the purpose of more conveniently describing and explaining the essence of the utility model, and interpreting them as any additional restrictions is contrary to the spirit of the utility model.

Claims

1. A multi-level cooling water channel die lip mechanism for a fast multi-cavity preform injection mold, comprising a fixing plate (1) and a hot runner mounting plate (2), characterized in that: The fixing plate (1) is provided with an injection main nozzle (3), the hot runner mounting plate (2) is provided with a manifold plate (4), the injection main nozzle (3) is connected to the manifold plate (4), a plurality of nozzle seats (5) are provided at the bottom of the manifold plate (4), a preform injection molding part (6) is provided in the nozzle seats (5), a multi-cavity cooling part (7) is provided at the bottom of the hot runner mounting plate (2), the bottom of the nozzle seats (5) extends into the multi-cavity cooling part (7), a temperature control heating element (8) is embedded in the manifold plate (4), and the temperature control heating element (8) and the injection main nozzle (3) are arranged alternately.

2. The multi-level cooling channel die lip mechanism of the rapid multi-cavity preform injection mold according to claim 1, characterized in that: The multi-cavity cooling part (7) comprises a plurality of nozzle cooling concave cavities (9) arranged at the bottom of the hot runner mounting plate (2), the positions of the preform injection molded part (6) and the nozzle cooling concave cavities (9) correspond to each other, and a circulation connection part (10) is arranged inside the hot runner mounting plate (2), and the circulation connection part (10) is connected to the nozzle cooling concave cavities (9).

3. The multi-level cooling channel die lip mechanism of the rapid multi-cavity preform injection mold according to claim 2, characterized in that: The circulation connection portion (10) comprises a circulation connection groove (11) arranged in the hot runner mounting plate (2), a connecting channel (12) is arranged between the circulation connection groove (11) and the nozzle cooling cavity (9), one end of the connecting channel (12) is connected to the circulation connection groove (11), and the other end is connected to the nozzle cooling cavity (9).

4. The multi-level cooling channel die lip mechanism of the rapid multi-cavity preform injection mold according to claim 3, characterized in that: A water inlet channel (13) and a water outlet channel (14) are provided on the side of the circulation connection groove (11), and the water inlet channel (13) and the water outlet channel (14) are parallel to each other.

5. The multi-level cooling channel die lip mechanism of the rapid multi-cavity preform injection mold according to claim 4, characterized in that: The temperature-controlled heating element (8) comprises a manifold plate heating tube (15) arranged in the manifold plate (4); the manifold plate heating tube (15) and the injection main nozzle (3) are arranged in an alternating manner.

6. The multi-level cooling channel die lip mechanism of the rapid multi-cavity preform injection mold according to claim 5, characterized in that: A junction box (16) is provided on the side of the hot runner mounting plate (2), and the junction box (16) is electrically connected to the heating pipe (15) of the manifold plate.

7. The multi-level cooling channel die lip mechanism of the rapid multi-cavity preform injection mold according to claim 6, characterized in that: The preform injection molded part (6) comprises a beryllium copper nozzle (17) and a valve needle (18) which are arranged in a nozzle seat (5).

8. The multi-level cooling channel die lip mechanism of the rapid multi-cavity preform injection mold according to claim 7, characterized in that: A heat insulating cap (19) is provided between the beryllium copper nozzle (17) and the nozzle seat (5).

9. The multi-level cooling channel die lip mechanism of the rapid multi-cavity preform injection mold according to claim 1, characterized in that: The main injection nozzle (3) is sleeved with a main nozzle heating coil (20).

10. The multi-level cooling channel die lip mechanism of the rapid multi-cavity preform injection mold according to claim 7, characterized in that: A valve needle pressing block (21) and a piston (22) are arranged in the fixed plate (1), and the piston (22) is connected to the valve needle (18).

Images