Mixed-color injection stretch blow molding hollow forming device

Abstract

The utility model relates to the technical field of plastic hollow forming, and discloses a mixed color injection stretch blow molding hollow forming device which comprises a main body rack. The mixed-color injection stretching blow molding hollow forming device comprises a single-color mode and a double-color mode, in the double-color mode of the device, nozzles of a main injection mechanism and an auxiliary injection mechanism communicate with two sub-runners of a double-color hot runner device correspondingly, and the nozzles of the main injection mechanism and the auxiliary injection mechanism communicate with two sub-runners of the double-color hot runner device correspondingly; the main injection mechanism and the auxiliary injection mechanism inject molten raw materials with different colors (types) into sub-runners of the two-color hot runner device according to an injection molding process, the two-color hot runner device converges the molten raw materials of the two sub-runners in sequence and injects the converged molten raw materials into a pipe blank mold for molding, and a mixed-color gradually-changing layered pipe blank is obtained; and the rotary conveying mechanism conveys the pipe blank to the blow molding station, the pipe blank passes through the blow molding station to obtain a color-mixed and gradually-changed layered hollow product, the color-mixed hollow product is conveyed to the taking-out station through the rotary conveying mechanism, the color-mixed hollow product is taken out, and the color-mixed and gradually-changed hollow product is obtained.

Description

Technical Field

[0001] This utility model relates to the field of plastic hollow molding technology, specifically a color mixing injection stretch blow molding hollow molding device. Background Technology

[0002] With the continuous development of plastic hollow molding technology, hollow plastic products are also constantly developing towards diversification, personalization, and colorization. The market demand for mixed-color hollow products is increasing. In the field of hollow molding, there are currently three mainstream molding processes for mixed-color hollow products: First, after the hollow molding machine produces transparent hollow products, a spray painting process is used to spray the surface of the transparent hollow products to obtain hollow products with multi-colored surfaces; Second, a two-step hollow molding machine is used to produce mixed-color tube preforms through an injection molding machine, and then through processes such as heating and temperature-controlled blow molding to obtain hollow products with multi-colored bottles; Third, a two-color one-step injection stretch blow molding machine is used to form mixed-color plastic hollow products in one machine, combining injection molding, stretching, and blow molding.

[0003] Spray painting is suitable for the production of multi-colored hollow products. However, due to the characteristics of the spraying process, it has drawbacks such as generating waste gas and the hollow product's inner cavity being easily contaminated by paint. The two-step method is suitable for the production of single-color and mixed-color hollow products, but due to the numerous processes, it requires more equipment, is easily damaged by the environment during the handling and transportation of preforms, requires heating, has high energy consumption for heat preservation, has relatively low efficiency, a relatively high scrap rate, requires secondary clamping, and has uneven parting line distribution and unsightly appearance. Existing one-step injection stretch blow molding machines can only produce mixed-color hollow products by using specific two-color molding machines. These specific one-step molding machines are limited to mixed-color hollow products, and their application range is relatively narrow. Utility Model Content

[0004] (a) Technical problems to be solved

[0005] The purpose of this invention is to provide a color-mixing injection stretch blow molding hollow molding device to solve the problem mentioned in the background art that the one-step hollow molding machine can only be limited to color-mixing hollow products, and its application scope is relatively limited.

[0006] (II) Technical Solution

[0007] To achieve the above objectives, this utility model provides the following technical solution: a color mixing injection stretch blow molding hollow molding device, comprising a main frame, a main injection mechanism I horizontally arranged along the long axis of the main frame, a secondary injection mechanism II arranged on one side of the main frame, and a molding mechanism arranged on the top of the main frame away from the main injection mechanism I.

[0008] Preferably, the molding mechanism includes an injection molding station one, a blow molding station two, a take-out station, a rotary conveying mechanism, a two-color hot runner device, and a preform mold. The injection molding station one is provided on the top of the main frame away from the main injection mechanism one. In the two-color mode of the device, the nozzles of the main injection mechanism and the auxiliary injection mechanism are respectively connected to the two branch channels of the two-color hot runner device. The main injection mechanism and the auxiliary injection mechanism inject molten raw materials of different colors (types) into the branch channels of the two-color hot runner device according to the injection molding process.

[0009] Preferably, a blow molding station two is provided on the outside of the injection molding station one, and a take-out station is provided on one side of the injection molding station one. A rotary conveying mechanism is provided on one side of the take-out station. The dual-color hot runner device sequentially injects the molten raw materials from the two branch channels into the tube blank mold to form a tube blank with mixed colors and gradient layers. The rotary conveying mechanism transports the tube blank to the blow molding station. After passing through the blow molding station, the tube blank becomes a hollow product with mixed colors and gradient layers. The rotary conveying mechanism then transports the hollow product with mixed colors to the take-out station to remove the hollow product with mixed colors and gradient layers, resulting in a hollow product with mixed colors and gradient layers.

[0010] Preferably, a dual-color hot runner device is provided on the inner side of the injection molding station one, and the top of the dual-color hot runner device is provided with the injection molding station one. The top of one side of the dual-color hot runner device is connected to the tube blank mold. In the single-color mode of the device, the dual-color hot runner mechanism needs to be replaced with a normal single-color hot runner. The auxiliary injection mechanism is moved to an empty position, the main injection mechanism is connected to the hot runner, and the main injection mechanism injects molten raw material into the hot runner. After being injected into the tube blank mold in the injection molding station through the hot runner, a solid-color tube blank is obtained. The rotary conveying mechanism transports the tube blank to the blow molding station, and the tube blank is obtained as a solid-color hollow product after passing through the blow molding station.

[0011] Preferably, a control module is provided on the top of the main frame. The control module is electrically connected to the main injection mechanism, the auxiliary injection mechanism, and the molding mechanism. The mixed-color hollow product is transported to the take-out station by the rotating conveyor mechanism to remove the pure-color hollow product, resulting in a mixed-color gradient hollow product. The device can form in one step, and one machine can produce hollow products of multiple colors such as single color and two colors. It can switch between single color and two color modes.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] 1. This color-mixing injection stretch blow molding hollow molding device includes two operating modes: single-color mode and two-color mode. In the two-color mode, the nozzles of the main injection mechanism and the auxiliary injection mechanism are respectively connected to the two branch channels of the two-color hot runner device. The main injection mechanism and the auxiliary injection mechanism inject molten raw materials of different colors (types) into the branch channels of the two-color hot runner device according to the injection molding process. The two-color hot runner device sequentially merges the molten raw materials of the two branch channels and injects them into the tube blank mold to form a mixed-color and gradient-layered tube blank. The rotary conveyor mechanism transports the tube blank to the blow molding station. After passing through the blow molding station, the tube blank becomes a mixed-color and gradient-layered hollow product. The rotary conveyor mechanism then transports the mixed-color hollow product to the take-out station to take out the mixed-color hollow product, resulting in a mixed-color gradient hollow product.

[0014] 2. In the single-color injection stretch blow molding hollow molding device, the dual-color hot runner mechanism needs to be replaced with a regular single-color hot runner in the single-color mode. The auxiliary injection mechanism is moved to an empty position, and the main injection mechanism is connected to the hot runner. The main injection mechanism injects molten raw material into the hot runner, which is then injected into the tube blank mold in the injection molding station through the hot runner to obtain a solid-color tube blank. The rotary conveyor transports the tube blank to the blow molding station, where the tube blank obtains a solid-color hollow product. The rotary conveyor transports the mixed-color hollow product to the removal station to remove the solid-color hollow product, resulting in a mixed-color gradient hollow product. The device can perform one-time molding, and one machine can produce hollow products of various colors such as single-color and dual-color. It can switch between single-color and dual-color modes. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0016] Figure 2 This is a schematic diagram of the dual-color mode structure of this utility model;

[0017] Figure 3 This is a schematic diagram of the monochrome mode structure of this utility model;

[0018] Figure 4 This is a schematic diagram of the dual-color hot runner device of this utility model.

[0019] In the diagram: 1. Main frame; 2. Main injection mechanism one; 3. Secondary injection mechanism two; 4. Molding mechanism; 401. Injection molding station one; 402. Blow molding station two; 403. Take-out station; 404. Rotary conveying mechanism; 405. Two-color hot runner device; 406. Billet mold; 5. Control module. Detailed Implementation

[0020] 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.

[0021] Please see Figures 1-4 This utility model provides a technical solution: a color mixing injection stretch blow molding hollow molding device, including a main frame 1, a main injection mechanism 2 horizontally arranged in the long axis direction of the main frame 1, a secondary injection mechanism 3 arranged on one side of the main frame 1, and a molding mechanism 4 arranged on the top of the side of the main frame 1 away from the main injection mechanism 2.

[0022] The molding mechanism 4 includes an injection molding station 401, a blow molding station 402, a take-out station 403, a rotary conveyor mechanism 404, a two-color hot runner device 405, and a preform mold 406. The injection molding station 401 is located on the top of the main frame 1, away from the main injection mechanism 2. The blow molding station 402 is located outside the injection molding station 401. The take-out station 403 is located on one side of the injection molding station 401. The rotary conveyor mechanism 404 is located on one side of the take-out station 403. The two-color hot runner device 405 is located inside the injection molding station 401. The top of the dual-color hot runner device 405 is equipped with an injection molding station 401. The top of one side of the dual-color hot runner device 405 is connected to the preform mold 406. The top of the main frame 1 is equipped with a control module 5, which is electrically connected to the main injection mechanism 2, the auxiliary injection mechanism 3, and the molding mechanism 4. When using the mixed-color injection stretch blow molding hollow molding device, it includes two operating modes: single-color mode and dual-color mode. In the dual-color mode, the nozzles of the main injection mechanism and the auxiliary injection mechanism are respectively connected to the two branch channels of the dual-color hot runner device 405. The injection unit and the auxiliary injection unit inject molten raw materials of different colors (types) into the branch channels of the two-color hot runner device 405 according to the injection molding process. The two-color hot runner device 405 sequentially injects the molten raw materials from the two branch channels into the preform mold 406 to form a preform with mixed colors and gradient layers. The rotary conveyor mechanism 404 transports the preform to the blow molding station. After passing through the blow molding station, the preform becomes a hollow product with mixed colors and gradient layers. The rotary conveyor mechanism 404 then transports the hollow product with mixed colors to the take-out station 403 to remove the hollow product with mixed colors and gradient layers, resulting in a hollow product with mixed colors and gradient layers. In this mode, the dual-color hot runner mechanism needs to be replaced with a regular single-color hot runner. The auxiliary injection mechanism is moved to an empty position, and the main injection mechanism is connected to the hot runner. The main injection mechanism injects molten raw material into the hot runner, which is then injected into the tube blank mold 406 in the injection molding station through the hot runner to obtain a solid-color tube blank. The rotary conveyor mechanism 404 transports the tube blank to the blow molding station. The tube blank passes through the blow molding station to obtain a solid-color hollow product. The rotary conveyor mechanism 404 then transports the mixed-color hollow product to the take-out station 403 to remove the solid-color hollow product, resulting in a mixed-color gradient hollow product. The device can perform one-time molding.

[0023] Working Principle: The mixed-color injection stretch blow molding hollow molding device includes two operating modes: single-color and two-color. In the two-color mode, the nozzles of the main injection mechanism and the auxiliary injection mechanism are connected to the two branch channels of the two-color hot runner device 405. The main injection mechanism and the auxiliary injection mechanism inject molten raw materials of different colors (types) into the branch channels of the two-color hot runner device 405 according to the injection molding process. The two-color hot runner device 405 sequentially injects the molten raw materials from the two branch channels into the preform mold 406 to form a mixed-color and gradually layered preform. The rotary conveyor mechanism 404 transports the preform to the blow molding station. After passing through the blow molding station, the preform becomes a mixed-color and gradually layered hollow product. The rotary conveyor mechanism 404 then... The mixed-color hollow product is transported to the removal station 403 to remove the mixed-color hollow product, resulting in a mixed-color gradient hollow product. In the single-color mode of the device, the dual-color hot runner mechanism needs to be replaced with a regular single-color hot runner. The auxiliary injection mechanism is moved to an empty position, and the main injection mechanism is connected to the hot runner. The main injection mechanism injects molten raw material into the hot runner, which is then injected into the tube blank mold 406 in the injection molding station through the hot runner to obtain a solid-color tube blank. The rotary conveyor mechanism 404 transports the tube blank to the blow molding station. The tube blank passes through the blow molding station to obtain a solid-color hollow product. The mixed-color hollow product is then transported to the removal station 403 by the rotary conveyor mechanism 404 to remove the solid-color hollow product, resulting in a mixed-color gradient hollow product. The device can perform one-time molding.

[0024] Finally, it should be noted that the above content is only used to illustrate the technical solution of this utility model, and is not intended to limit the scope of protection of this utility model. Simple modifications or equivalent substitutions made by those skilled in the art to the technical solution of this utility model do not depart from the essence and scope of the technical solution of this utility model.

Claims

1. A co-injection stretch blow molding apparatus for a hollow article, comprising a main frame (1), characterized in that: The main body frame (1) is provided with a main injection mechanism one (2) in the long axis direction, one side of the main body frame (1) is provided with a vice injection mechanism two (3), and the top of the side, away from the main injection mechanism one (2), of the main body frame (1) is provided with a forming mechanism (4); The forming mechanism (4) comprises an injection molding station one (401), a blow molding station two (402), a taking-out station (403), a rotary conveying mechanism (404), a double-color hot runner device (405) and a pipe blank mold (406), and the top of the side, away from the main injection mechanism one (2), of the main body frame (1) is provided with the injection molding station one (401); The outer side of the injection molding station one (401) is provided with the blow molding station two (402), one side of the injection molding station one (401) is provided with the taking-out station (403), and one side of the taking-out station (403) is provided with the rotary conveying mechanism (404); The inner side of the injection molding station one (401) is provided with the double-color hot runner device (405), the top of the double-color hot runner device (405) is provided with the injection molding station one (401), and the top of one side of the double-color hot runner device (405) is connected with the pipe blank mold (406); The top of the main body frame (1) is provided with a control module (5), the control module (5) is electrically connected with the main injection mechanism one (2), the control module (5) is electrically connected with the vice injection mechanism two (3), and the control module (5) is electrically connected with the forming mechanism (4).

Images