A bottle preform heating device

Abstract

The application provides a bottle embryo heating device, relates to the technical field of bottle embryo heating, and comprises a base, a guide rod is fixedly arranged on the base, a bottle embryo internal heating assembly and a bottle embryo placing assembly are sequentially arranged on the guide rod from top to bottom, a bottle embryo surface heating assembly is arranged below the bottle embryo placing assembly on the base, a first driving air cylinder for driving the bottle embryo internal heating assembly to move up and down and a second driving air cylinder for driving the bottle embryo placing assembly to move up and down are arranged on the base, the bottle embryo internal heating assembly and the bottle embryo surface heating assembly are arranged simultaneously, the interior and the outer surface of the bottle embryo can be heated simultaneously, the problem that the interior of the bottle embryo is difficult to be effectively heated in the traditional heating mode is solved, the bottle embryo is heated more uniformly as a whole, the quality and the performance of the plastic bottle after blow molding are improved, the uneven wall thickness distribution is reduced, the yield is improved, and the production cost is reduced.

Description

Technical Field

[0001] This application relates to the field of preform heating technology, and more specifically, to a preform heating device. Background Technology

[0002] In the production process of plastic bottles, preform heating is a key step before blow molding. Existing preform heating devices mainly use infrared radiation or hot air circulation to heat the preform.

[0003] However, whether it is infrared heating or hot air circulation heating, the heat source mainly acts on the outer surface of the preform, making it difficult to effectively penetrate into the preform and heat it evenly inside. This results in insufficient heating inside the preform, leading to uneven heating of the preform as a whole. During the blow molding process, this causes an imbalance in the wall thickness distribution of the plastic bottle, which greatly affects the quality and performance of the plastic bottle, reduces the yield rate, and increases production costs. Summary of the Invention

[0004] The purpose of this application is to provide a preform heating device that can solve the technical problem that when existing preform heating devices are used, the heat source acts on the outer surface of the preform, making it difficult for the inside of the preform to be heated evenly, resulting in uneven heating of the preform as a whole, causing the plastic bottle wall thickness to be unbalanced during blow molding, reducing the yield rate and increasing the cost.

[0005] This application provides a preform heating device, including a base, a guide rod fixed on the base, and a preform internal heating component and a preform placement component arranged sequentially from top to bottom on the guide rod. A preform surface heating component is arranged on the base below the preform placement component. The base is provided with a first driving cylinder for driving the preform internal heating component to move up and down and a second driving cylinder for driving the preform placement component to move up and down.

[0006] Furthermore, the preform internal heating assembly includes a heating rod and a mounting plate. The heating rod is fixedly mounted on the mounting plate, and the mounting plate is movably mounted on the guide rod. The first driving cylinder is fixedly mounted on the base, and the telescopic rod of the first driving cylinder is fixedly connected to the bottom of the mounting plate.

[0007] Furthermore, the preform placement assembly includes a placement rack, a locking block, and a locking block. The placement rack is movably mounted on the guide rod. The placement rack has a placement groove adapted to the locking block and a through hole penetrating the placement groove. The locking block is placed in the placement groove and has a U-shaped locking groove adapted to the preform mouth. The placement rack has a locking groove communicating with the placement groove. The locking block is slidably disposed in the locking groove. One side of the locking block has an arc-shaped locking groove adapted to the preform mouth. The second driving cylinder is fixedly mounted on the base, and the telescopic rod of the second driving cylinder is fixedly connected to the bottom of the placement rack.

[0008] Furthermore, the preform surface heating assembly includes an insulation cylinder and a heating plate disposed inside the insulation cylinder. The heating plate is fitted against the inner wall of the insulation cylinder, and the insulation cylinder is detachably connected to the base.

[0009] Furthermore, a positioning block is fixedly provided at the bottom of the heat preservation cylinder, and a positioning groove adapted to the positioning block is provided on the base, and the positioning block is placed in the positioning groove.

[0010] Furthermore, the top of the insulation cylinder is provided with a first rubber buffer ring, the inner diameter of which is larger than the diameter of the through hole.

[0011] Furthermore, the bottom of the mounting plate is provided with a second rubber buffer ring, the heating rod is located inside the second rubber buffer ring, and the second rubber buffer ring can abut against the top of the locking block.

[0012] The beneficial effects of this utility model are:

[0013] This invention incorporates both an internal heating component and a surface heating component for the preform, enabling simultaneous heating of both the interior and exterior surfaces of the preform. This solves the problem of effectively heating the interior of the preform in traditional heating methods, resulting in more uniform heating of the preform. This helps improve the quality and performance of the blow-molded plastic bottle, reduces uneven wall thickness distribution, increases yield, and lowers production costs. Attached Figure Description

[0014] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 These are schematic diagrams of structures in some embodiments of this application;

[0016] Figure 2 These are cross-sectional views of some embodiments of this application;

[0017] Figure 3 This is an exploded view of the preform placement assembly in some embodiments of this application;

[0018] The reference numerals in the attached figures are as follows:

[0019] 1. Base; 11. Positioning groove; 2. Guide rod; 3. Preform internal heating assembly; 31. Heating rod; 32. Mounting plate; 4. Preform placement assembly; 41. Placement rack; 411. Placement groove; 412. Through hole; 413. Locking groove; 42. Locking block; 421. U-shaped slot; 43. Locking block; 431. Arc-shaped slot; 5. Preform surface heating assembly; 51. Insulation cylinder; 511. Positioning block; 52. Heating plate; 6. First drive cylinder; 7. Second drive cylinder; 8. First rubber buffer ring; 9. Second rubber buffer ring; 10. Preform body. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0021] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0022] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0023] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this application is in use. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this application. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0024] Furthermore, terms such as "horizontal," "vertical," and "sag" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0025] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "set up," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances. Specific Implementation

[0026] like Figure 1 and Figure 2 As shown, this application provides a preform heating device, including a base 1, a guide rod 2 fixed on the base 1, and a preform internal heating component 3 and a preform placement component 4 arranged sequentially from top to bottom on the guide rod 2. A preform surface heating component 5 is arranged on the base 1 below the preform placement component 4. The base 1 is equipped with a first driving cylinder 6 for driving the preform internal heating component 3 to move up and down, and a second driving cylinder 7 for driving the preform placement component 4 to move up and down. In use, the preform body 10 to be processed is placed on the preform placement component 4, and the preform is moved up and down by the second driving cylinder 7. The preform placement component 4 moves the preform body 10 downwards, so that the bottle body below the bottle mouth of the preform body 10 is located inside the preform surface heating component 5. Then, the first driving cylinder 6 drives the preform internal heating component 3 downwards. The preform internal heating component 3 and the preform surface heating component 5 heat the inside and outside surfaces of the preform simultaneously, which solves the problem of difficulty in effectively heating the inside of the preform in traditional heating methods. This makes the preform more evenly heated, which helps to improve the quality and performance of the plastic bottle after blow molding, reduce uneven wall thickness distribution, increase yield, and reduce production costs.

[0027] like Figure 1 and Figure 2 As shown, the preform internal heating assembly 3 includes a heating rod 31 and a mounting plate 32. The heating rod 31 is fixed on the mounting plate 32, which is movably mounted on the guide rod 2. The first drive cylinder 6 is fixed on the base 1, and the telescopic rod of the first drive cylinder 6 is fixedly connected to the bottom of the mounting plate 32. The first drive cylinder 6 drives the mounting plate 32 to move the heating rod 31 up and down, which can send the heating rod 31 into the preform. The heating rod 31 heats the inside of the preform, which helps to improve the problem of insufficient heating inside the preform. The guide rod 2 provides a stable guide for the movement of the mounting plate 32, ensuring the stability of the mounting plate 32 during the up and down movement. At the same time, the position of the heating rod 31 can be flexibly adjusted by the first drive cylinder 6. For preforms of different heights, the heating rod 31 can be accurately sent to the appropriate heating position, which enhances the adaptability of this device to preforms of different heights.

[0028] like Figure 1-3 As shown, the preform placement assembly 4 includes a placement frame 41, a locking block 42, and a locking block 43. The placement frame 41 is movably mounted on the guide rod 2. The placement frame 41 has a placement groove 411 that matches the locking block 42. The placement frame 41 has a through hole 412 that penetrates the placement groove 411. The locking block 42 is placed in the placement groove 411. The locking block 42 has a U-shaped groove 421 that matches the preform neck. The placement frame 41 has a locking groove 413 that communicates with the placement groove 411. The locking block 43 is slidably mounted in the locking groove 413. One side of the locking block 43 has an arc-shaped groove 431 that matches the preform neck. The second drive cylinder 7 is fixed on the base 1. The extension rod of the second drive cylinder 7 is connected to the base 1. The bottom of the placement rack 41 is fixedly connected. When in use, the operator aligns the bottle mouth of the preform body 10 with the U-shaped slot 421 and inserts it, so that the preform body 10 is firmly locked on the locking block 42. Then, the bottle body below the bottle mouth of the preform body 10 is inserted into the through hole 412, and the locking block 42 is placed in the placement groove 411. Then, the locking block 43 in the locking groove 413 is pushed towards the preform body 10, so that the locking block 43 is inserted into the U-shaped slot, and the arc-shaped slot 431 of the locking block 43 abuts against the bottle mouth of the preform body 10, so that the preform body 10 can be stably placed on the placement rack 41. With the help of the second drive cylinder 7, the placement rack 41 is driven to move up and down along the guide rod 2, so that the up and down position of the preform body 10 can be adjusted.

[0029] like Figure 1 and Figure 2As shown, the preform surface heating assembly 5 includes an insulation cylinder 51 and a heating plate 52 disposed inside the insulation cylinder 51. The heating plate 52 is in close contact with the inner wall of the insulation cylinder 51. The insulation cylinder 51 is detachably connected to the base 1. The insulation cylinder 51 can prevent and reduce heat loss and reduce energy waste. When the bottle body below the bottle mouth of the preform 10 is inserted into the insulation cylinder 51, the heating plate 52 is energized to heat the surface of the preform 10. Since the heating plate 52 is in close contact with the inner wall of the insulation cylinder 51, it can heat the periphery of the preform 10 evenly. When preforms of different heights need to be heated, in order to ensure that the bottle body below the bottle mouth of the preform 10 can be effectively heated, the insulation cylinder 51 can be removed from the base 1 and replaced with an insulation cylinder 51 of different depths to meet production needs and improve the practicality of the device.

[0030] like Figure 2 As shown, a positioning block 511 is fixedly provided at the bottom of the heat preservation cylinder 51, and a positioning groove 11 adapted to the positioning block 511 is provided on the base 1. The positioning block 511 is placed in the positioning groove 11. Through the cooperation between the positioning block 511 and the positioning groove 11, the position of the heat preservation cylinder 51 remains unchanged after each replacement, and the relative position of the preform body 10 and the heating component is accurate during the heating process.

[0031] like Figure 1 and Figure 2 As shown, the top of the insulation cylinder 51 is provided with a first rubber buffer ring 8. The inner diameter of the first rubber buffer ring 8 is larger than the diameter of the through hole 412. When the placement rack 41 moves down, the first rubber buffer ring 8 can abut against the bottom of the placement rack 41. The first rubber buffer ring 8 has a certain elasticity, which can prevent the placement rack 41 from making a rigid collision with the insulation cylinder 51 when it moves down. At the same time, the first rubber buffer ring 8 is made of high temperature resistant material. When the first rubber buffer ring 8 abuts against the bottom of the placement rack 41, it can enhance the heat preservation effect of the insulation cylinder 51, reduce the heat loss from the placement rack 41 and the insulation cylinder 51, improve the heating efficiency, and reduce energy consumption.

[0032] like Figure 2 As shown, the bottom of the mounting plate 32 is provided with a second rubber buffer ring 9, and the heating rod 31 is located inside the second rubber buffer ring 9. The second rubber buffer ring 9 can abut against the top of the locking block 42. The second rubber buffer ring 9 has a certain elasticity. When the mounting plate 32 moves up and down under the action of the first driving cylinder 6, if the second rubber buffer ring 9 abuts against the top of the locking block 42, it can play a buffering role, avoid rigid collision between the mounting plate 32 and the locking block 42, and protect the locking block 42 and the preform from damage.

[0033] The above are merely preferred embodiments of this application and are not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A preform heating apparatus characterized by: The device includes a base, on which a guide rod is fixed. From top to bottom, a preform internal heating component and a preform placement component are sequentially arranged on the guide rod. Below the preform placement component, a preform surface heating component is arranged on the base. The base is provided with a first driving cylinder for driving the preform internal heating component to move up and down and a second driving cylinder for driving the preform placement component to move up and down.

2. A preform heating apparatus as in claim 1, wherein: The preform internal heating assembly includes a heating rod and a mounting plate. The heating rod is fixedly mounted on the mounting plate, and the mounting plate is movably mounted on the guide rod. The first driving cylinder is fixedly mounted on the base, and the telescopic rod of the first driving cylinder is fixedly connected to the bottom of the mounting plate.

3. A preform heating apparatus as in claim 2, wherein: The preform placement assembly includes a placement rack, a locking block, and a locking block. The placement rack is movably mounted on the guide rod. The placement rack has a placement groove that matches the locking block. The placement rack has a through hole that passes through the placement groove. The locking block is placed in the placement groove. The locking block has a U-shaped groove that matches the preform mouth. The placement rack has a locking groove that communicates with the placement groove. The locking block is slidably mounted in the locking groove. One side of the locking block has an arc-shaped groove that matches the preform mouth. The second drive cylinder is fixedly mounted on the base. The telescopic rod of the second drive cylinder is fixedly connected to the bottom of the placement rack.

4. A preform heating apparatus as in claim 3, wherein: The preform surface heating assembly includes an insulation cylinder and a heating plate disposed inside the insulation cylinder. The heating plate is fitted against the inner wall of the insulation cylinder, and the insulation cylinder is detachably connected to the base.

5. A preform heating apparatus as in claim 4, wherein: The bottom of the heat preservation cylinder is fixed with a positioning block, and the base is provided with a positioning groove that matches the positioning block, and the positioning block is placed in the positioning groove.

6. A preform heating apparatus as in claim 4, wherein: The top of the insulation cylinder is provided with a first rubber buffer ring, the inner diameter of which is larger than the diameter of the through hole.

7. A preform heating apparatus as in claim 3, wherein: The bottom of the mounting plate is provided with a second rubber buffer ring, the heating rod is located inside the second rubber buffer ring, and the second rubber buffer ring can abut against the top of the locking block.

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