A plastic bottle preform mouth shaping device

Abstract

The utility model relates to the technical field of plastic bottle production, especially to a plastic bottle embryo bottle mouth plastic shaping device. The utility model discloses the technical problem provides a plastic bottle embryo bottle mouth plastic shaping device of supplementary finishing. Technical scheme: a plastic bottle embryo bottle mouth plastic shaping device, including: base etc. The base top is equipped with the fixing frame, installs the ring, the fixing frame is '' 7 '' character shape, the fixing frame upper portion is equipped with the installation ring towards the lower side, the arc block, the installation ring inside both sides open have the sliding slot, the sliding slot between the both sides of installation ring is equipped with two arc blocks of sliding type, two arc blocks are about installation ring center horizontal symmetry. The utility model is limited to the plastic bottle embryo by spacing block when plastic shaping, then utilizes first electric push rod to drive arc block and plastic shaping block and bottle mouth thread sleeve joint, and heating assembly softens embryo bottle mouth.

Description

Technical Field

[0001] This utility model relates to the field of plastic bottle production technology, and in particular to a plastic bottle preform mouth shaping device. Background Technology

[0002] Plastic preforms are semi-finished products in the manufacture of plastic bottles. They are a key intermediate product in the plastic bottle production process. They are tubular or bottle-shaped structures that are pre-made with the basic shape of a plastic bottle but are not fully stretched through injection molding. They retain key structures such as the neck, threads, and bottle mouth of the plastic bottle. Subsequently, the bottle body is fully expanded and molded through blow molding to create a complete plastic bottle structure.

[0003] Since the bottle neck of the plastic bottle preform is directly injection molded from the mold, the precision of the mold will gradually decrease with the number of uses, and even flash may occur. This will affect the precision of the bottle neck thread, and in the subsequent blow molding process, the bottle neck of the plastic bottle preform cannot perfectly match the blow molding mold, resulting in reduced sealing and affecting the molding operation of the plastic bottle.

[0004] Therefore, it is necessary to design a device for shaping the mouth of a plastic preform to assist in the trimming process. Utility Model Content

[0005] To overcome the shortcomings of mold precision gradually decreasing with repeated use, even leading to flash problems that affect the precision of bottle neck threads, and the inability of the plastic bottle preform neck to perfectly match the blow molding mold during subsequent blow molding processes, resulting in reduced sealing and affecting the molding operation of plastic bottles, the technical problem of this utility model is to provide a plastic bottle preform neck shaping device for auxiliary trimming.

[0006] Technical solution: A plastic bottle preform neck shaping device, comprising: a base and a fixing frame, the fixing frame being provided on the top of the base, a mounting ring facing downwards being provided on the upper part of the fixing frame, two arc-shaped blocks being slidably arranged between the two sides of the mounting ring, the two arc-shaped blocks being horizontally symmetrical about the center of the mounting ring, a first electric push rod being symmetrically arranged on both sides of the horizontal mounting ring, the telescopic rod of the first electric push rod being connected to the adjacent arc-shaped block, a limiting block being provided at the center of the top of the mounting ring, the bottom of the limiting block being a spiral inclined surface that matches the thread at the top of the plastic bottle preform neck, heating components being evenly spaced on the inner vertical surface of the arc-shaped block, a shaping block being detachably provided in the middle of the inner vertical surface of the arc-shaped block, the shaping block having an inclined groove matching the thread of the plastic bottle neck.

[0007] Furthermore, it is particularly preferred that the two first electric actuators operate independently of each other.

[0008] Furthermore, it is particularly preferred that the device also includes: a second electric push rod, wherein the second electric push rod is provided on the base and located directly below the mounting ring, and a placement seat is rotatably provided on the telescopic rod of the second electric push rod. A clamping assembly is provided on the inner side of the placement seat, and a fixing ring is provided on the base directly opposite the placement seat. A threaded groove with the same pitch as the bottle mouth of the plastic bottle preform is opened on the inner side of the fixing ring, and a fixing post is provided on the side of the placement seat. The fixing post is in contact with the threaded groove.

[0009] Furthermore, it is particularly preferred that the thread length of the threaded groove is greater than the thread length of the bottle mouth of the plastic bottle preform.

[0010] In addition, it is particularly preferred that the device also includes a positioning post, wherein the positioning post is provided at the center of the bottom of the limiting block, and the diameter of the positioning post is the same as the inner diameter of the mouth of the plastic bottle preform.

[0011] In addition, it is particularly preferred that the block also includes a pressure sensor, wherein multiple pressure sensors are provided on the spiral inclined surface at the bottom of the limiting block.

[0012] Compared with the prior art, the present invention has the following advantages: The present invention limits the plastic bottle preform by a limiting block during the molding process, and then uses the first electric push rod to drive the arc block and the molding block to engage with the bottle mouth thread. The heating component softens the bottle mouth of the preform, and then rotates and moves the bottle body down along the direction of the thread, so that the threads at each part of the bottle mouth are shaped by the molding block, thereby improving the bottle mouth qualification rate. Attached Figure Description

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

[0014] Figure 2 This is a three-dimensional structural diagram of the arc-shaped block, the first electric push rod, and the limiting block of this utility model.

[0015] Figure 3 This is an exploded view of the first partial three-dimensional structure of this utility model.

[0016] Figure 4 This is an exploded view of the second partial three-dimensional structure of this utility model.

[0017] Figure 5 This is a three-dimensional structural diagram of the placement base, fixing ring, and fixing column of this utility model.

[0018] Figure 6 This is a three-dimensional cross-sectional view of the fixing ring of this utility model.

[0019] The above-mentioned figures include the following reference numerals: 1. base, 2. fixing frame, 3. mounting ring, 4. arc-shaped block, 5. first electric push rod, 6. limiting block, 7. heating component, 8. shaping block, 9. second electric push rod, 10. placement seat, 11. clamping component, 12. fixing ring, 13. fixing column, 14. threaded groove, 15. positioning column, 16. pressure sensor. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings. It should be understood that these descriptions are merely exemplary and not intended to limit the scope of this utility model. Furthermore, descriptions of well-known structures and technologies are omitted in the following description to avoid unnecessarily obscuring the concept of this utility model.

[0021] Example 1 like Figures 1 to 4 As shown, this utility model provides a plastic bottle preform bottle mouth shaping device, specifically including: a base 1, a fixing frame 2, a mounting ring 3, an arc-shaped block 4, a first electric push rod 5, a limiting block 6, a heating component 7, and a shaping block 8; The base 1 has a fixed frame 2 on top, which is shaped like a "7". The upper part of the fixed frame 2 has a mounting ring 3 facing downward. The mounting ring 3 has sliding grooves on both sides inside. Two arc-shaped blocks 4 are slidably arranged between the sliding grooves on both sides of the mounting ring 3. The two arc-shaped blocks 4 are horizontally symmetrical about the center of the mounting ring 3. The two arc-shaped blocks 4 can form a ring shape when they come into contact with each other. Among them, the mounting ring 3 is symmetrically provided with first electric push rods 5 on both horizontal sides away from the slide groove. The telescopic rod of the first electric push rod 5 is connected to the nearby arc block 4. The mounting ring 3 is provided with a limiting block 6 at the top center position. The bottom of the limiting block 6 is a spiral inclined surface that matches the thread at the top of the bottle mouth of the plastic bottle preform. Heating components 7 are evenly spaced on the inner vertical surface of the arc-shaped block 4; Among them, a shaping block 8 is detachably provided in the middle of the vertical surface inside the arc-shaped block 4, and the shaping block 8 has an oblique groove that matches the thread of the plastic bottle mouth.

[0022] For example, before shaping the plastic bottle preform, the operator first selects a limiting block 6 and a shaping block 8 with the same bottle mouth specifications as the plastic bottle preform to be shaped and sets them into the device. In the initial state, the two arc-shaped blocks 4 inside the mounting ring 3 are far apart from each other. When it is necessary to shape the bottle mouth of the plastic bottle preform, the bottle mouth of the plastic bottle preform is inserted into the inner side of the mounting ring 3, and the threaded bevel of the bottle mouth of the plastic bottle preform is attached to the bottom of the limiting block 6. Then, the first electric push rod 5 drives the two arc-shaped blocks 4 to move closer to each other and attach together. The shaping block 8 set inside the arc-shaped block 4 is engaged with the threaded part of the bottle mouth of the plastic bottle preform. Then, the heating component 7 is activated to heat and soften the bottle mouth of the preform to a certain extent. Finally, by rotating along the direction of the thread and moving the plastic bottle preform downward, the bottle mouth of the plastic bottle preform and every threaded position on the bottle mouth pass through the shaping block 8, thereby completing the shaping operation of the bottle mouth of the plastic bottle preform through the shaping block 8. In this way, the pass rate of the plastic bottle mouth is improved by trimming.

[0023] In this embodiment, the independent operation of the two first electric push rods 5 ensures the normal operation of the device. When the plastic bottle preform rotates away from the arc block 4, the individual arc block 4 and the shaping block 8 can normally contact the bottle mouth of the plastic bottle in sequence, thus avoiding the normal operation of the other first electric push rod 5 if one of the first electric push rods 5 is damaged.

[0024] Example 2 like Figure 1 , Figure 5 and Figure 6 As shown, based on Embodiment 1, it further includes a second electric push rod 9, a placement seat 10, a clamping assembly 1, a fixing ring 12, and a fixing post 13; The base 1 is provided with a second electric push rod 9 located directly below the mounting ring 3. The telescopic rod of the second electric push rod 9 is rotatably provided with a placement seat 10. The center of the placement seat 10 is directly opposite the center of the limiting block 6. The inner side of the placement seat 10 is provided with a clamping assembly 11 for fixing the plastic bottle preform. The base 1 is provided with a fixing ring 12 located directly opposite the placement seat 10. The inner side of the fixing ring 12 has a threaded groove 14 with the same pitch as the bottle mouth of the plastic bottle preform. The side of the placement seat 10 is provided with a fixing post 13, which contacts and engages with the threaded groove 14.

[0025] Initially, the second electric push rod 9 is in the retracted state, and the fixing post 13 on the placement seat 10 is located at the lowest end of the threaded groove 14. During operation, the plastic bottle preform is first placed into the placement seat 10. At this time, the clamping assembly 11 is not activated. Then, the second electric push rod 9 controls the placement seat 10 to move upward, and the fixing post 13 moves upward along the threaded groove 14. The placement seat 10 rotates relative to the fixing ring 12. When the bottle mouth of the plastic bottle preform contacts the bottom of the limiting block 6, the limiting block 6 pushes the plastic bottle preform to rotate within the placement seat 10 through the inclined surface at the bottom. Finally, the threaded inclined surface of the bottle mouth of the plastic bottle preform fits against the bottom of the limiting block 6. Subsequently, the arc-shaped blocks 4 move closer to each other and the plastic bottle preform... After the preform is fitted, the heating component 7 inside the arc block 4 heats and softens the mouth of the plastic preform. Then, the clamping component 11 is activated to fix the plastic preform. Then, the second electric push rod 9 is activated, which drives the placement seat 10 to move downward. The placement seat 10 rotates under the cooperation of the fixing column 13 and the threaded groove 14. The plastic preform is fixed to the placement seat 10 by the clamping component 11. When the placement seat 10 moves along the threaded groove 14, the plastic preform moves away from the arc block 4 and the shaping block 8 along the same path. In this way, through the above structure and steps, the plastic preform can automatically extend into the arc block 4 and automatically rotate out, improving the automation level of the device and simplifying manual operation.

[0026] In this embodiment, the thread length of the threaded groove 14 is greater than the thread length on the mouth of the plastic bottle preform, which can provide a longer distance for the movement of the plastic bottle preform. After the plastic bottle preform is separated from the molding block 8, it can rotate and descend a certain distance, which facilitates the placement and removal of the plastic bottle preform.

[0027] like Figure 3 and Figure 4 As shown, based on Embodiment 1, it further includes a positioning post 15. The positioning post 15 is provided at the center of the bottom of the limiting block 6. The diameter of the positioning post 15 is the same as the inner diameter of the bottle mouth of the plastic bottle preform.

[0028] The positioning post 15 at the center of the limiting block 6 can assist in positioning the plastic bottle preform when it is inserted into the mounting ring 3, ensuring that the inclined surface at the bottom of the limiting block 6 is in accurate contact with the threaded surface of the bottle mouth of the plastic bottle preform.

[0029] like Figure 4 As shown, based on Embodiment 1, it further includes a pressure sensor 16, and multiple pressure sensors 16 are evenly spaced on the spiral inclined surface at the bottom of the limiting block 6.

[0030] The pressure sensor 16 installed on the threaded inclined surface at the bottom of the limit block 6 can more accurately determine whether the plastic bottle preform is in complete contact with the limit block 6. Only when all the pressure sensors 16 are stably triggered will the thread at the mouth of the plastic bottle preform be in perfect contact with the threaded inclined surface at the bottom of the limit block 6. If the pressure sensor 16 is not triggered or is only partially triggered, it means that the specifications of the plastic bottle preform are inconsistent with the specifications corresponding to the limit block 6.

[0031] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. A device for shaping the mouth of a plastic bottle preform, characterized in that, include: The base (1) and the fixing frame (2) are provided. The fixing frame (2) is provided on the top of the base (1). The fixing frame (2) is provided with a mounting ring (3) facing downward. Two arc blocks (4) are provided between the two sides of the mounting ring (3). The two arc blocks (4) are horizontally symmetrical about the center of the mounting ring (3). The first electric push rod (5) is provided symmetrically on both sides of the horizontal mounting ring (3). The telescopic rod of the first electric push rod (5) is connected to the nearby arc block (4). A limiting block (6) is provided at the center of the top of the mounting ring (3). The bottom of the limiting block (6) is a spiral inclined surface that matches the thread at the top of the bottle mouth of the plastic bottle preform. Heating components (7) are evenly spaced on the inner vertical surface of the arc block (4). A shaping block (8) is detachably provided in the middle of the inner vertical surface of the arc block (4). The shaping block (8) has a slanted groove that matches the thread of the bottle mouth of the plastic bottle.

2. A device for shaping the finish of a plastic preform as defined in claim 1, wherein The two first electric push rods (5) work independently of each other.

3. A device for shaping the finish of a plastic preform as defined in claim 1, further characterized by include: The second electric push rod (9) is provided on the base (1) and located directly below the mounting ring (3). The telescopic rod of the second electric push rod (9) is rotatably provided with a placement seat (10). The inner side of the placement seat (10) is provided with a clamping assembly (11). The base (1) is provided with a fixing ring (12) directly opposite the placement seat (10). The inner side of the fixing ring (12) has a threaded groove (14) with the same pitch as the bottle mouth of the plastic bottle preform. The side of the placement seat (10) is provided with a fixing post (13). The fixing post (13) is in contact with the threaded groove (14).

4. A device for shaping the finish of a plastic preform as defined in claim 3, wherein The thread length of the threaded groove (14) is greater than the thread length of the bottle mouth of the plastic bottle preform.

5. A device for shaping the finish of a plastic preform as defined in claim 3, further characterized by include: Positioning post (15): The positioning post (15) is provided at the center of the bottom of the limiting block (6).

6. A device for shaping the finish of a plastic preform as defined in claim 4, further characterized by include: Pressure sensor (16): Multiple pressure sensors (16) are provided on the spiral inclined surface at the bottom of the limiting block (6).

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