A plastic bottle preheating device

Abstract

The utility model relates to the technical field of plastic bottle production, especially to a plastic bottle embryo preheating and heating device, the utility model provides such a plastic bottle embryo preheating and heating device, include: mounting seat, the inside of mounting seat is equipped with electric push rod, the inside of mounting seat is equipped with heat preservation box, the heat preservation box is opposite the telescopic direction of electric push rod, the inside of heat preservation box is equipped with the mounting column of sliding type, the telescopic rod of electric push rod slidingly penetrates heat preservation box and is connected with mounting column, the utility model discloses through the plastic bottle embryo body is put into the inner mould, will install the column and heating rod and reach the inside of inner mould, realize the inner mould and plastic bottle embryo body heating simultaneously, and through the control mounting column heat conductivity can realize different temperature heating, be convenient for subsequent blow mould adjustment, this is to save heating time through sealed heating to avoid excessive heat dispersion to the outside world simultaneously.

Description

Technical Field

[0001] This utility model relates to the field of plastic bottle production technology, and in particular to a preheating and heating device for plastic bottle preforms. Background Technology

[0002] Plastic preforms are intermediate products in the plastic bottle production process. By first injection molding the raw materials into plastic preforms, and then heating and blow molding the plastic preforms, they can be made into various shapes.

[0003] In the traditional plastic bottle production process, the plastic preform is usually placed on a conveyor structure first. Then, the plastic preform and the mold are heated to a suitable temperature. This softens the bottle body and prevents the plastic bottle from cooling and hardening during the blow molding process. Then, it is conveyed to the blow molding mold. The upper and lower molds of the mold seal the plastic preform in the mold, leaving only the bottle opening facing outwards. Then, the plastic bottle is formed by the blow molding operation.

[0004] In the above process, the heating operations of the mold and the plastic bottle preform are carried out separately, and the heating of the plastic bottle preform is usually completed by passing the preform through the heating component. This heating efficiency is low. After the mold and the plastic bottle preform are heated, they need to be moved together to complete the blow molding operation. During this process, the temperature is easily reduced due to heat loss. At the same time, the heating component has a large contact area with the external environment, and the heat of the heating component will be directly lost to the external environment.

[0005] Therefore, it is necessary to design a preheating device for plastic preforms that is easy to heat and avoids heat loss. Utility Model Content

[0006] In order to overcome the disadvantages of easy cooling due to heat loss during the heating process, and the large contact area between the heating component and the external environment, the heat of the heating component will be directly lost to the external environment, the technical problem is: to provide a plastic preheating device that is convenient to heat and avoids heat loss.

[0007] The technical solution of this utility model is: a preheating and heating device for plastic bottle preforms, comprising: a mounting base and an electric push rod. The electric push rod is provided inside the mounting base, and an insulation box is provided inside the mounting base. An installation column is slidably provided inside the insulation box. The telescopic rod of the electric push rod is connected to the installation column. The end of the installation column not connected to the electric push rod is tubular. Multiple heating rods are provided on the outside of the installation column. A first outer mold is provided inside the mounting base. A telescopic component is provided on the mounting base. A second outer mold is provided on the telescopic end of the telescopic component. The first outer mold and the second outer mold are respectively provided with inner molds for plastic bottle molding. Fixed seats are provided on the vertical sides of the installation column and the first outer mold. A sealing plate is rotatably provided between the fixed seat of the installation column and the first outer mold.

[0008] Furthermore, when the mounting post extends into the inner mold for heating, the portion of the mounting post located on the outside of the inner mold contacts the first outer mold and the second outer mold, completely sealing and blocking the inner mold.

[0009] Furthermore, it also includes: a sliding seat, which is slidably provided inside the insulation box; a mounting column passes through the side of the sliding seat near the fixed seat; the sliding seat and the mounting column are in contact and cooperate; a fixed column is provided at one end of the sliding seat passing through the mounting column; one end of the fixed column slides through the fixed seat and the sealing plate; a plurality of fixed protrusions are evenly spaced on the inner side of the sealing plate; a corresponding transmission thread is opened on the fixed column near the fixed protrusion; the fixed protrusion and the transmission thread are slidably sleeved and cooperate; and an elastic element connects the sliding seat and the insulation box.

[0010] Furthermore, the number of transmission threads on the fixed part is at least three.

[0011] Furthermore, each of the mounting columns has a through groove on its inner side facing the heating rod.

[0012] The beneficial effects are as follows: This utility model allows the plastic preform to be placed into the inner mold, and the mounting column and heating rod to be extended into the inner mold, so that the inner mold and the plastic preform can be heated at the same time. Furthermore, by controlling the thermal conductivity of the mounting column, heating at different temperatures can be achieved, which is convenient for subsequent blow molding adjustments. This saves heating time and avoids excessive heat loss to the outside through sealed heating. Attached Figure Description

[0013] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0014] Figure 2 This is a partial three-dimensional structural diagram of the present invention.

[0015] Figure 3 This is a cross-sectional view of the first partial structure of this utility model.

[0016] Figure 4 This is a cross-sectional view of the second partial structure of this utility model.

[0017] Figure 5 This is a partially exploded three-dimensional structural view of the present invention.

[0018] Figure 6 This is a three-dimensional structural diagram of the mounting column and heating rod of this utility model.

[0019] Component names and serial numbers in the diagram: 1_Mounting base, 2_Electric push rod, 3_Insulation box, 4_Mounting column, 41_Heating rod, 5_First outer mold, 6_Telescopic assembly, 7_Second outer mold, 8_Inner mold, 9_Fixed base, 10_Sealing plate, 11_Sliding base, 12_Fixed column, 13_Transmission thread, 14_Fixed protrusion, 15_Elastic element, 16_Through groove. Detailed Implementation

[0020] The preferred technical solution of this utility model will be described in detail below with reference to the accompanying drawings.

[0021] Example 1 like Figures 1 to 4 and Figure 6 As shown, this utility model provides a plastic preheating device, which specifically includes a mounting base 1, an electric push rod 2, an insulation box 3, a mounting column 4, a heating rod 41, a first outer mold 5, a telescopic component 6, a second outer mold 7, an inner mold 8, a fixing base 9, and a sealing plate 10. The mounting base 1 has an electric push rod 2 inside and an insulation box 3 inside, which is directly opposite the extension / retraction direction of the electric push rod 2. An installation column 4 is slidably mounted inside the insulation box 3. The extension / retraction rod of the electric push rod 2 slides through the insulation box 3 and connects to the installation column 4. The end of the installation column 4 not connected to the electric push rod 2 is tubular. Multiple heating rods 41 are evenly spaced on the vertical outer side of the installation column 4. A first outer mold 5 is located inside the mounting base 1. A telescopic assembly 6 is mounted on the mounting base 1. A second outer mold 7 is located on the telescopic end of the telescopic assembly 6. The second outer mold 7 and the first outer mold 5 are joined to form a complete mold. The first outer mold 5 and the second outer mold 7 are respectively provided with two parts, an inner mold 8 for plastic bottle molding. After the first outer mold 5 and the second outer mold 7 are connected, the inner mold 8 on the first outer mold 5 and the second outer mold 7 are spliced ​​to form a complete plastic bottle molding mold. The mounting column 4 and the vertical side of the first outer mold 5 are provided with fixing seats 9. A sealing plate 10 is rotatably provided between the mounting column 4 and the fixing seat 9 of the first outer mold 5. The sealing plate 10 is in sliding sealing contact with the ends of the first outer mold 5 and the second outer mold 7. When the mounting column 4 extends into the inner mold 8 for heating, the part of the mounting column 4 located outside the inner mold 8 contacts the first outer mold 5 and the second outer mold 7 to completely seal and block the inner mold 8.

[0022] For example, during installation, the device is positioned at the plastic preform blow molding location. The first outer mold 5 and the second outer mold 7 are separated. Then, a suitable inner mold 8 is selected and placed inside the first outer mold 5 and the second outer mold 7. In use, the plastic preform is first placed into the inner mold 8, and then the first outer mold 5 and the second outer mold 7 are merged to ensure that the plastic preform remains in the inner mold 8. Subsequently, the heating rod 41 of the mounting column 4 is activated to heat to a suitable temperature. Then, the sealing plate 10 is controlled to rotate relative to the insulation box 3 to a position where it no longer covers the insulation box 3 and the first outer mold 5. Then, the electric push rod 2 is activated, extending the mounting column 4 and the heating rod 41 into the inner mold 8. At the same time, the plastic preform extends into the tubular end of the mounting column 4. This achieves simultaneous heating of the plastic preform and the inner mold 8 within the mold, and the inner mold 8 is directly... Heated by heating rod 41, the plastic preform is heated by heat conduction through mounting column 4. By controlling the thermal conductivity of mounting column 4, different heating effects can be achieved between the inner mold 8 and the plastic preform, facilitating normal adjustment and operation in subsequent blow molding steps. After heating, the electric push rod 2 drives the mounting base 1 and heating rod 41 downwards back into the insulation box 3. Then, the sealing plate 10 is controlled to rotate back to its initial position, so that the sealing plate 10 seals the inner mold 8, ensuring the blow molding effect of the plastic preform. At the same time, the sealing plate 10 seals the insulation box 3, ensuring that the heat from mounting column 4 and heating rod 41 dissipates to the outside. After the plastic bottle is molded, the telescopic component 6 controls the second outer mold 7 to leave the first outer mold 5. The molded plastic bottle can then be removed and replaced with a new plastic preform, and the above operation is repeated.

[0023] In this embodiment, when the mounting post 4 extends into the inner mold 8, the end of the mounting post 4 located outside the inner mold 8 cooperates with the inner mold 8 to form a closed structure, thereby reducing heat loss when the inner mold 8 is heated.

[0024] like Figures 2 to 5 As shown, it also includes a sliding seat 11, a fixed post 12, a transmission thread 13, a fixed protrusion 14, and an elastic element 15; The insulation box 3 has a sliding seat 11 on its inner side. The side of the sliding seat 11 near the fixed seat 9 passes through the mounting post 4. The sliding seat 11 and the mounting post 4 are in contact and cooperate. One end of the sliding seat 11 that passes through the mounting post 4 is provided with a fixed post 12. One end of the fixed post 12 slides through the fixed seat 9 and the sealing plate 10. The inner side of the sealing plate 10 is provided with a plurality of fixed protrusions 14 evenly spaced. The fixed post 12 has corresponding transmission threads 13 near the fixed protrusions 14. The fixed post 12 has at least three transmission threads 13. The fixed protrusions 14 and the transmission threads 13 are slidably sleeved and cooperated. An elastic element 15 connects the sliding seat 11 and the insulation box 3.

[0025] In the initial state, the mounting post 4 is located at the innermost side of the insulation box 3. The sliding seat 11 is compressed by the mounting post 4, and the elastic element 15 is compressed. The fixed post 12 is moved along with the sliding seat 11 by the mounting post 4 to the position of the fixed protrusion 14 in the sealing plate 10 at one end of the transmission thread 13. At this time, the sealing plate 10 completely covers the inner mold 8 and the insulation box 3. When the mounting post 4 is pushed into the inner mold 8 by the electric push rod 2, the elastic element 15 resets and moves the sliding seat 11 along with the mounting post 4. At the same time, the fixed post 12 moves with the sliding seat 11, and the transmission thread 13 of the fixed post 12 is thus connected to the fixed protrusion 14. The mounting post 14 drives the sealing plate 10 to rotate relative to the fixed seat 9. When the sealing plate 10 rotates to the point where it no longer blocks the inner mold 8 and the insulation box 3, the mounting post 4 disengages from the sliding seat 11. After the mounting post 4 retracts into the insulation box 3, it re-engages with the sliding seat 11 and continues to move, causing the sliding seat 11 to press the elastic element 15 back to its initial position. The fixed post 12 is also driven back to its initial position, and the sealing plate 10 thus completely blocks the inner mold 8 and the insulation box 3 again. This allows the sealing plate 10 to quickly and simultaneously complete the automatic and complete blocking of the inner mold 8 and the insulation box 3 during the heating operation. In this embodiment, three or more transmission threads 13 cooperate with the fixing protrusion 14 on the inner side of the sealing plate 10, which better and more effortlessly enables the sealing plate 10 to rotate quickly with the fixed post 12.

[0026] Each of the mounting posts 4 has a through groove 16 on its inner side, directly opposite the heating rod 41.

[0027] The inner groove 16 of the mounting post 4 facilitates the transfer of heat from the heating rod 41 to the plastic preform, ensuring that the plastic preform and the inner mold 8 reach the same temperature as soon as possible when the temperature difference is small. It also avoids uneven heating of the plastic preform due to the poor heat conduction of the mounting post 4.

[0028] The present application has been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of the present application. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of the present application. Therefore, the content of this specification should not be construed as a limitation of the present application.

Claims

1. A preheating and heating device for plastic bottle preforms, characterized in that, include: The mounting base (1) and the electric push rod (2) are provided on the inner side of the mounting base (1). The heat preservation box (3) is provided on the inner side of the mounting base (1). The mounting column (4) is slidably provided on the inner side of the heat preservation box (3). The telescopic rod of the electric push rod (2) is connected to the mounting column (4). The end of the mounting column (4) that is not connected to the electric push rod (2) is tubular. Multiple heating rods (41) are provided on the outer side of the mounting column (4). The first outer mold (5) is provided on the inner side of the mounting base (1). The telescopic component (6) is provided on the mounting base (1). The telescopic end of the telescopic component (6) is provided with a second outer mold (7). The inner mold (8) for plastic bottle molding is provided in the first outer mold (5) and the second outer mold (7). The mounting column (4) and the first outer mold (5) are both provided with a fixing seat (9). A sealing plate (10) is rotatably provided between the fixing seat (9) of the first outer mold (5) and the mounting column (4).

2. The preheating and heating device for plastic bottle preforms according to claim 1, characterized in that, When the mounting post (4) is inserted into the inner mold (8) for heating, the part of the mounting post (4) located outside the inner mold (8) contacts the first outer mold (5) and the second outer surface, completely sealing and blocking the inner mold (8).

3. The preheating and heating device for plastic bottle preforms according to claim 1, characterized in that, Also includes: A sliding seat (11) is provided on the inner side of the insulation box (3). The sliding seat (11) passes through the mounting column (4) on the side near the fixed seat (9). The sliding seat (11) is in contact with the mounting column (4). A fixed column (12) is provided at one end of the sliding seat (11) that passes through the mounting column (4). One end of the fixed column (12) slides through the fixed seat (9) and the sealing plate (10). A plurality of fixed protrusions (14) are evenly spaced on the inner side of the sealing plate (10). A corresponding transmission thread (13) is opened on the fixed column (12) near the fixed protrusion (14). The fixed protrusion (14) and the transmission thread (13) are slidably sleeved together. An elastic element (15) is connected between the sliding seat (11) and the insulation box (3).

4. The preheating and heating device for plastic bottle preforms according to claim 3, characterized in that, The number of transmission threads (13) on the fixed part is at least three.

5. The plastic preform preheating device according to claim 3, characterized in that, Each of the mounting posts (4) has a through groove (16) on its inner side facing the heating rod (41).

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