Bottle preform injection molding mechanism for bottle body blow molding machine and bottle body blow molding machine

Abstract

The utility model relates to the technical field of bottle body blow molding machines, in particular to a bottle blank injection molding mechanism for a bottle body blow molding machine and the bottle body blow molding machine. Wherein the bottle blank injection molding mechanism comprises an injection mold used for injection molding of a bottle blank and mounted on the rack, and a water-liquid electromagnetic valve; a cooling water channel is formed in the injection mold, a water inlet of the cooling water channel is communicated with a water outlet of the water-liquid electromagnetic valve, a water outlet of the cooling water channel is communicated with a water return port of an external water conveying mechanism, and a water inlet of the water-liquid electromagnetic valve is communicated with a water outlet of the external water conveying mechanism. According to the utility model, the water-liquid electromagnetic valve is connected to the cooling water path of the injection mold, so that the water-liquid electromagnetic valve is in a normally closed state in the non-injection and pressure maintaining stages, water is not introduced into the cooling water path, the temperature of the injection mold is close to the indoor temperature, water mist or water drops are not easy to generate, the mold is prevented from rusting, and the appearance yield of products is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to bottle body blow molding machine technical field, more specifically, it relates to a bottle blank injection mechanism for bottle body blow molding machine and bottle body blow molding machine. BACKGROUND

[0002] Most of the beverage bottles on the market are produced by blow molding machines, which are machines that extrude or inject thermoplastic resin or plastic into a tubular bottle blank, place the bottle blank in a split mold when heated to a softened state, drive the mold to close with a mold closing mechanism, immediately introduce compressed air into the bottle blank to make the plastic bottle blank expand and adhere to the inner wall of the mold, and then cool and demold to produce various hollow products.

[0003] The existing injection molding mechanism for forming a bottle blank uses a direct cooling water method, which is simple and convenient, but in hot and humid weather, the mold is prone to fogging or water droplets, which can cause rusting of the mold and appearance defects such as pitting and lines on the surface of the bottle blank. SUMMARY

[0004] To address the deficiencies in the prior art, the present utility model aims to provide a bottle blank injection mechanism for a bottle body blow molding machine to solve the problem of mold fogging or water droplet formation in existing injection molding of bottle blanks.

[0005] The above technical objectives of the utility model are achieved through the following technical solutions:

[0006] A bottle blank injection mechanism for a bottle body blow molding machine, comprising an injection molding mold for injection molding a bottle blank and installed on a rack, and a water solenoid valve; the injection molding mold has a cooling water channel, the water inlet of the cooling water channel is in communication with the water outlet of the water solenoid valve, the water outlet of the cooling water channel is in communication with the water return port of an external water conveying mechanism, and the water inlet of the water solenoid valve is in communication with the water outlet of the external water conveying mechanism.

[0007] Optionally, the water solenoid valve is a normally closed solenoid valve.

[0008] Optionally, the injection molding mold is a hot runner mold.

[0009] Optionally, the injection molding mold comprises a lower mold and an upper mold adapted to the lower mold; the upper mold and the lower mold move relative to each other in the vertical direction to complete the opening and closing action.

[0010] Optionally, the upper mold has a mold cavity for two formed bottle blanks; and the cooling water channel is located inside the upper mold.

[0011] Another object of the present application is to provide a bottle body blow molding machine, which comprises a rack, the bottle blank injection molding mechanism, a blow molding die for blow molding the bottle blank into a bottle body, and a transfer mechanism for transferring the bottle blank from the bottle blank injection molding mechanism to the blow molding die.

[0012] Optionally, the rack is provided with a sliding table for carrying the injection molding die and a locking assembly for locking the injection molding die on the rack.

[0013] Compared with the prior art, the above-mentioned embodiments of the present application have the following beneficial effects: by connecting the water liquid electromagnetic valve to the cooling water channel of the injection mold, the water liquid electromagnetic valve is in a normally closed state during the non-injection and pressure maintaining stage, the cooling water channel is not watered, the temperature of the injection mold approaches the indoor temperature, water mist or water droplets are not easily generated, thereby preventing the mold from rusting and improving the appearance yield of the product. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 is a structural schematic view of the bottle body blow molding machine of the present application;

[0015] Figure 2 is Figure 1 an enlarged view of the A area in DETAILED DESCRIPTION

[0016] In order to make the purpose, features and advantages of the present application more apparent, specific embodiments of the present application will be described in detail below with reference to the accompanying drawings. The drawings show several embodiments of the present application. However, the present application can be realized in many different forms, and is not limited to the embodiments described herein.

[0017] The present application will be described in detail below with reference to the accompanying drawings and embodiments.

[0018] The present application provides a bottle blank injection molding mechanism for a bottle body blow molding machine, as shown in Figures 1-2 The present application provides a bottle blank injection molding mechanism for a bottle body blow molding machine, as shown in

[0019] In this embodiment, the water liquid electromagnetic valve is a conventional diaphragm type secondary opening valve pilot electromagnetic valve suitable for water or other gas-liquid as working medium, which can automatically control or remotely control the on-off of air, water, oil and other working medium pipelines. The water inlet of the water liquid electromagnetic valve is communicated with the water outlet of the external water conveying machine through a conduit, and the water outlet is communicated with the water inlet 121 of the cooling water path through a conduit; the water outlet 122 of the cooling water path is communicated with the water return port of the external water conveying machine through a conduit. The conventional ice water machine used in the injection molding field can output cooling water at a specific temperature. The cooling water enters the cooling water path inside the injection mold through the water liquid electromagnetic valve and the conduit, and then flows back to the inside of the external water conveying machine through the conduit for cooling treatment.

[0020] The water liquid electromagnetic valve is a normally closed electromagnetic valve, which is normally closed when the injection mold is not in production, and the cooling water path is not watered, the temperature of the injection mold approaches the indoor temperature, and it is not easy to produce water mist or water droplets, thereby preventing the mold from rusting and improving the appearance yield of the product. When the injection mold is in production (the time of the two stages of injection and pressure retention is the mold production time), the water liquid electromagnetic valve is opened synchronously under the control of the PLC, the cooling water path is watered, and the injection mold is cooled. In order to achieve rapid cooling of the injection mold, the water temperature is adjusted to 1-5℃ (the traditional cooling water temperature is about 20℃), and in the same time, the mold cooling is better, thereby shortening the cooling time and improving the yield. After a cycle of production, the water liquid electromagnetic valve is immediately powered off and closed. The specific power-on duration and power-on / power-off time of the water liquid electromagnetic valve can be set on the PLC computer on the bottle blowing machine.

[0021] Further, in order to reduce the waste of plastic and the scrap rate, and also to reduce the maintenance cost of the mold, the injection mold 1 adopts a hot runner mold.

[0022] As shown in Figure 2 , considering that the existing bottle injection mold is mostly opened in a left-right opening and closing manner, and the front mold and the rear mold are connected by screwing the rack, a long mold mounting time (hoisting by the overhead crane) is required. In this embodiment, the injection mold 1 includes a lower mold 11 and an upper mold 12 matched with the lower mold 11; the upper mold 12 and the lower mold 11 move relative to each other in the vertical direction to complete the opening and closing action. This setting saves the mold hoisting time, and after the upper mold 12 and the lower mold 11 are matched, the injection mold 1 is placed on the rack 1 by a forklift, the position is adjusted, and then it is fixed by screws. The specific structure of the injection mold 1 can be referred to the patent with publication number CN217258039U4, or a conventional whole embryo mold inlay structure can be adopted.

[0023] Further, as shown in Figure 2As shown, at least one cavity 123 for forming a bottle blank can be formed in the upper die 12 according to actual needs, and the number of cavities 123 is two in the embodiment. Cooling water channels are formed in the upper die 12.

[0024] Another object of the present application is to provide a bottle blowing machine, which comprises a rack 2, the bottle blank injection mechanism, a blowing die 3 for blowing the bottle blank into a bottle body, and a transfer mechanism 4 for transferring the bottle blank from the bottle blank injection mechanism to the blowing die 3 are arranged on the rack 2.

[0025] As shown, Figure 1 the injection mold 1 and the blowing die 3 are fixedly installed on the rack 1, the transfer mechanism 4 transfers the formed bottle blank to the blowing die 3, the blowing die 3 then inflates the bottle blank into a bottle body, and the transfer mechanism 4 then moves the bottle body out of the blowing die 3, and a taking mechanism waits to transfer the bottle body into a storage box.

[0026] Further, as shown, Figure 2 the rack 2 is provided with a sliding table 5 for carrying the injection mold 1 and a locking assembly 6 for locking the injection mold 1 on the rack 2. The locking assembly 6 is a conventional locking component in the art, which is composed of a screw and a pressing block. When the pressing block presses the lower die 11, the injection mold 1 is fixed on the rack 1 under the action of the screw. When the locking assembly 6 is loosened, the injection mold 1 can be quickly moved out of the rack 1 by pulling the sliding table 5, which provides a larger operating space for the mold installer and further improves the efficiency of disassembling and assembling the mold. The sliding table 5 is a drawer type sliding table, which is slidably connected to the rack 1 through a conventional limiting structure.

[0027] The above is only the preferred embodiment of the present application, and the protection scope of the present application is not limited to the above-mentioned embodiments. Any technical solution falling within the concept of the present application shall fall within the protection scope of the present application. It should be noted that for ordinary technical personnel in the technical field, some improvements and decorations without departing from the principle of the present application shall also be considered as the protection scope of the present application.

Claims

1. A preform injection mechanism for a bottle blow molding machine, characterized by, The injection mold for injection molding a bottle blank and installed on the rack, a water solenoid valve; the injection mold is provided with a cooling water channel, the water inlet of the cooling water channel is communicated with the water outlet of the water solenoid valve, the water outlet of the cooling water channel is communicated with the water return of the external water conveying mechanism, and the water inlet of the water solenoid valve is communicated with the water outlet of the external water conveying mechanism.

2. Preform injection unit for a bottle blowing machine according to claim 1, characterized in that, The water solenoid valve is a normally closed solenoid valve.

3. A preform injection unit for a bottle blowing machine according to claim 1, characterized in that, The injection mold is a hot runner mold.

4. A preform injection unit for a bottle blowing machine according to claim 1, characterized in that, The injection mold comprises a lower mold and a upper mold matched with the lower mold; the upper mold and the lower mold are relatively moved in the vertical direction to complete the opening and closing action.

5. A preform injection unit for a bottle blowing machine according to claim 2, characterized in that, The upper mold is provided with a mold cavity for two molded bottle blanks; the cooling water channel is located inside the upper mold.

6. A bottle blow molder characterized by, The rack is provided with the bottle blank injection molding mechanism, a blow mold for blow molding the bottle blank into a bottle body, and a transfer mechanism for transferring the bottle blank from the bottle blank injection molding mechanism to the blow mold.

7. The bottle blow molder of claim 6 wherein, The rack is provided with a sliding table for carrying the injection mold and a locking assembly for locking the injection mold on the rack.

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