Beverage bottle preform injection mold

Abstract

The utility model discloses a beverage bottle preform injection mold, which belongs to the technical field of beverage bottle production, and comprises a fixed mold and a movable mold, a complete cavity and a pouring channel are formed after the movable mold and the fixed mold are closed, an air cooling system is arranged on the fixed mold, and the movable mold is provided with an air outlet. The air cooling system is used for blowing cold air to the movable mold and the bottle preform on the movable mold; the air cooling system comprises an air hole set and an air supply mechanism, and the air hole set is located on the side, close to the movable mold, of the fixed mold. The utility model solves the problem that the temperature is too high after the bottle preform is demoulded in the prior art.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of beverage bottle production, especially to a beverage bottle embryo injection mold. BACKGROUND

[0002] The beverage bottle embryo injection mold is a key equipment in the plastic packaging industry, which forms a bottle embryo by injecting high-temperature molten plastic into a mold cavity. The traditional injection mold usually uses a water cooling system to cool the mold cavity, that is, a circulating cooling water path is set in the movable mold or the fixed mold, and the cooling water is used to take away the heat of the mold to achieve the solidification of the bottle embryo. Although water cooling can quickly reduce the temperature of the mold, the bottle embryo after demolding may still reach a high temperature due to material shrinkage and internal residual heat (the internal temperature of the bottle embryo after water cooling may still be higher than 70℃). In addition, the movable mold side (demolding side) is complex in structure, and the water cooling pipeline is difficult to uniformly cover the contact surface, resulting in insufficient heat dissipation in the local area of the bottle embryo.

[0003] After the injection of the beverage bottle embryo injection mold is completed, the bottle embryo needs to be quickly taken out by a mechanical hand or using the ejection discharging mode to shorten the production cycle. However, if the temperature is too high when the bottle embryo is demolded, the following problems may occur:

[0004] I. Reduced stability of mechanical hand material taking

[0005] The high-temperature bottle embryo is easy to stick to the vacuum suction cup or the clamping jaw of the mechanical hand, resulting in the falling off or local deformation of the bottle embryo. The residual heat of the bottle embryo is conducted through the metal parts of the mechanical hand, which may cause local thermal expansion of the mechanical arm, reducing the positioning accuracy and the reliability of repeated grabbing.

[0006] II. Bottle embryo deformation and quality defects

[0007] The bottle embryo that is not sufficiently cooled may deform, such as neck diameter shrinkage and bottom depression, after being separated from the mold due to the action of its own gravity or the clamping force of the mechanical hand, affecting the blow molding yield.

[0008] Therefore, the utility model provides a new scheme to solve the above problems. UTILITY MODEL CONTENTS

[0009] The utility model aims to provide a beverage bottle embryo injection mold, which solves the problem of excessively high temperature of the bottle embryo after demolding in the prior art.

[0010] The above technical purpose of the utility model is achieved by the following technical scheme:

[0011] A beverage bottle embryo injection mold, comprising a fixed mold and a movable mold, wherein the movable mold and the fixed mold form a complete cavity and a pouring channel after being closed, a wind cooling system is arranged on the fixed mold, and the wind cooling system is used to blow cold air to the movable mold and the bottle embryo on the movable mold;

[0012] The air cooling system comprises an air hole group and a gas supply mechanism, the air hole group is located on the side of the fixed mold close to the movable mold.

[0013] Further preferably, the air hole group comprises a main air hole and a plurality of auxiliary air holes, the main air hole is a straight hole perpendicular to the fixed mold closing surface, and the auxiliary air holes are inclined holes penetrating the fixed mold at an inclined angle.

[0014] Further preferably, the auxiliary air holes are arranged in a radial distribution around the main air hole.

[0015] Further preferably, the auxiliary air hole axis forms an angle of 5°-25° with the main air hole axis.

[0016] Further preferably, the air hole group comprises a plurality of air holes.

[0017] Further preferably, the gas supply mechanism comprises an air pump, a conveying pipeline and a gas conveying passage.

[0018] The gas conveying passage is located in the fixed mold, the fixed mold is provided with an interface, one end of the conveying pipeline is connected with the interface, and the other end is connected with the outlet of the air pump, and the conveying pipeline is in communication with the gas conveying passage through the interface.

[0019] Further preferably, the gas conveying passage comprises a first air outlet passage, a second air outlet passage, an air flow passage and an air inlet passage.

[0020] One end of the air inlet passage is in communication with the interface, and the other end is in communication with the air flow passage, the air inlet end of the first air outlet passage is in communication with the air flow passage, the main air hole is located at the air outlet end of the first air outlet passage, the air inlet end of the second air outlet passage is in communication with the air flow passage, and the auxiliary air hole is located at the air outlet end of the second air outlet passage.

[0021] Further preferably, the cold air temperature is 10-25℃.

[0022] In summary, the present application has the following advantages:

[0023] The beverage bottle embryo injection molding mold of the present application comprises a fixed mold and a movable mold, the movable mold and the fixed mold are closed to form a complete cavity and a pouring channel, the fixed mold is provided with an air cooling system, the air cooling system is used for blowing cold air to the movable mold and the bottle embryo on the movable mold, the air cooling system comprises an air hole group and a gas supply mechanism, and the air hole group is located on the side of the fixed mold close to the movable mold.

[0024] The air-cooling system directly sprays low-temperature airflow onto the moving mold and preform surface through an air vent system, quickly removing heat from the mold and preform. The cold air directly contacts the preform surface, resulting in higher heat transfer efficiency and significantly shortening cooling time, lowering the preform temperature to below 40°C. This reduces the waiting time for the robotic arm to handle the preform, improving production efficiency. It also ensures stable preform temperature, preventing high-temperature adhesion or low-temperature embrittlement. Simultaneously, the low-temperature airflow quickly solidifies the preform surface, reducing deformation during robotic arm gripping and improving handling stability. This solves the problem of excessively high preform temperatures after demolding in existing technologies. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the overall structure of an injection mold according to a preferred embodiment of the present invention;

[0026] Figure 2 yes Figure 1 Enlarged schematic diagram of structure A in the middle;

[0027] Figure 3 This is a partial cross-sectional view of the mold in a preferred embodiment of the present invention;

[0028] Figure 4 This is a schematic cross-sectional view of the fixed mold in a preferred embodiment of the present invention.

[0029] In the diagram, 1 is the fixed mold; 2 is the air hole group; 21 is the main air hole; 22 is the secondary air hole; 31 is the interface; 321 is the first air outlet channel; 322 is the second air outlet channel; 323 is the air flow channel; 324 is the air inlet channel; and 4 is the injection port. Detailed Implementation

[0030] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0031] Example: A beverage bottle preform injection mold, such as Figures 1-4 As shown, the system includes a fixed mold 1 and a moving mold. When the fixed mold and the moving mold 1 are closed, they form a complete cavity and a gating channel. The moving mold is existing technology, so its specific structure and working principle will not be described in detail here. The fixed mold 1 is equipped with an air-cooling system, which is used to blow cold air onto the moving mold and the preform on the moving mold. The air-cooling system includes an air vent group 2 and an air supply mechanism. The air vent group 2 is located inside the fixed mold 1, that is, on the side closer to the moving mold. The air supply mechanism is used to supply cold air to the air vent group 2, and the air vent group 2 is used to blow cold air onto the moving mold and the preform on the moving mold.

[0032] Preferably, the temperature of the cold air is 10-25℃.

[0033] Low-temperature air at 10-25℃ can rapidly reduce the surface temperature of the preform, thereby lowering the preform temperature to below 40℃ and shortening the cooling time.

[0034] In the above technical scheme, the air cooling system directly sprays low-temperature airflow (10-25℃) to the moving die and the bottle embryo surface through the air hole group 2 to quickly take away the heat of the mold and the bottle embryo. The cold air directly contacts the bottle embryo surface, the heat conduction efficiency is higher, the cooling time is significantly shortened, the bottle embryo temperature is reduced to below 40℃, the waiting time of the mechanical hand for taking materials is reduced, and the production efficiency is improved. It can ensure the stability of the bottle embryo temperature, avoid high-temperature adhesion or low-temperature embrittlement problems. At the same time, the low-temperature airflow can quickly solidify the bottle embryo surface, reduce the deformation of the mechanical hand clamping, and improve the stability of taking materials.

[0035] Referring to Figures 1-4 , the air hole group 2 includes a main air hole 21 and a secondary air hole 22. The main air hole 21 is a straight hole perpendicular to the mold closing surface of the fixed die 1. The secondary air hole 22 is an inclined hole penetrating the fixed die 1 at an inclined angle.

[0036] Preferably, four secondary air holes 22 are provided, which are distributed in a radial manner around the main air hole 21.

[0037] Preferably, the axis of the secondary air hole 22 forms an angle of 5°-25° with the axis of the main air hole 21.

[0038] Specifically, the axis of the secondary air hole 22 forms an angle of 12°-20° with the axis of the main air hole 21.

[0039] Preferably, the fixed die 1 is provided with multiple rows of injection ports 4 near the moving die side. Each row of injection ports 4 includes multiple injection port 4 units. The air hole group 2 is provided with multiple air hole groups 2, and the multiple air hole groups 2 are located between the adjacent two rows of injection ports 4.

[0040] In the above technical scheme, the main air hole 21 is perpendicular to the mold closing surface of the fixed die 1, forming a straight airflow perpendicular to the mold closing surface of the moving die, preferentially cooling the moving die area and quickly leading out the core heat. The secondary air hole 22 is distributed in a radial manner around the main air hole 21 at an angle of 12°-20°, and the inclined airflow is mainly used for cooling the bottle embryo. The air hole group 2 is arranged between the adjacent two rows of injection ports 4, ensuring that the melt filling and cooling do not interfere with each other. The inclined angle of the secondary air hole 22 is limited to 12°-20°, which expands the airflow coverage range and improves the cooling efficiency. The combination design of the straight hole main air hole 21 and the inclined hole secondary air hole 22 is easier to process than the traditional dense micro-hole structure, which shortens the overall cooling time.

[0041] Referring to Figures 1-4 , the gas supply mechanism includes a gas pump, a conveying pipeline and a gas conveying channel. The gas conveying channel is located in the fixed die 1, and the outside of the fixed die 1 is provided with an interface 31. One end of the conveying pipeline is connected with the interface 31, and the other end is connected with the outlet of the gas pump. The conveying pipeline communicates with the gas conveying channel through the interface 31.

[0042] Preferably, in order to provide cold air meeting the temperature requirement, the air supply mechanism further comprises a refrigeration system, which can be a compression refrigeration unit, a cold storage medium exchange device or other types. The refrigeration system can be directly connected in series between the air pump outlet and the delivery pipeline, or can be installed at the front end of the air pump air inlet to pre-cool the suction air.

[0043] Preferably, the air delivery channel comprises a first air outlet channel 321, a second air outlet channel 322, an air flow channel 323 and an air inlet channel 324. One end of the air inlet channel 324 is in communication with the interface 31, and the other end is in communication with the air flow channel 323. The air inlet end of the first air outlet channel 321 is in communication with the air flow channel 323, and the main air hole 21 is located at the air outlet end of the first air outlet channel 321. The air inlet end of the second air outlet channel 322 is in communication with the air flow channel 323, and the auxiliary air hole 22 is located at the air outlet end of the second air outlet channel 322.

[0044] In the above technical solution, the air delivery channel is used to deliver cold air sent by the air pump. The cold air passes through the air inlet channel 324 and the air flow channel 323 in sequence through the interface 31, and then is delivered into the air hole group 2 through the first air outlet channel 321 and the second air outlet channel 322. The cold air can also cool the mold 1 when it is delivered in the air delivery channel.

[0045] The specific embodiment is only an explanation of the utility model, and is not a limitation of the utility model. Those skilled in the art can make modifications to the embodiment without creative contribution after reading the specification, but as long as the modifications are within the scope of the claims of the utility model, they are protected by the patent law.

Claims

1. A beverage bottle preform injection mold comprising a fixed mold (1) and a movable mold, said movable mold and said fixed mold (1) forming, when closed, a complete cavity and a gating channel, characterized in that: The fixed mold (1) is provided with a wind cooling system for blowing cold wind to the movable mold and the bottle embryo on the movable mold. The wind cooling system comprises a gas hole group (2) and a gas supply mechanism, and the gas hole group (2) is located on the side of the fixed mold (1) close to the movable mold.

2. A beverage bottle preform injection mold according to claim 1, characterized in that: The gas hole group (2) comprises a main gas hole (21) and a secondary gas hole (22), the main gas hole (21) is a straight hole perpendicular to the mold closing surface of the fixed mold (1), and the secondary gas hole (22) is an inclined hole penetrating through the fixed mold (1) at an inclined angle.

3. A beverage bottle preform injection mold according to claim 2, characterized in that: A plurality of secondary gas holes (22) are arranged around the main gas hole (21) in a radial manner.

4. A beverage bottle preform injection mold according to claim 3, wherein: The axis of the secondary gas hole (22) forms an angle of 5°-25° with the axis of the main gas hole (21).

5. A beverage bottle preform injection mold in accordance with claim 2, wherein: The gas hole group (2) is provided with a plurality of gas holes.

6. A beverage bottle preform injection mold in accordance with claim 2, wherein: The gas supply mechanism comprises a gas pump, a conveying pipeline and a gas conveying passage. The gas conveying passage is located in the fixed mold (1), the fixed mold (1) is provided with an interface (31), one end of the conveying pipeline is connected with the interface (31), the other end is connected with the outlet of the gas pump, and the conveying pipeline communicates with the gas conveying passage through the interface (31).

7. A beverage bottle preform injection mold according to claim 6, characterized in that: The gas conveying passage comprises a first gas outlet passage (321), a second gas outlet passage (322), a gas flow passage (323) and an air inlet passage (324). One end of the air inlet passage (324) communicates with the interface (31), and the other end communicates with the gas flow passage (323), the gas inlet end of the first gas outlet passage (321) communicates with the gas flow passage (323), the main gas hole (21) is located at the gas outlet end of the first gas outlet passage (321), the gas inlet end of the second gas outlet passage (322) communicates with the gas flow passage (323), and the secondary gas hole (22) is located at the gas outlet end of the second gas outlet passage (322).

8. A beverage bottle preform injection mold in accordance with claim 1, wherein: The temperature of the cold wind is 10-25℃.

Images