Plastic bottle blank wall thickness detection device

Abstract

The utility model relates to the technical field of bottle blank detection, and particularly discloses a plastic bottle blank wall thickness detection device, which comprises a base and a measuring head, a stand column is arranged at the upper end of the base, a supporting rod and a supporting rod for supporting a bottle blank are arranged on the side wall of the stand column, a supporting strip matched with the inner wall of the bottle blank is arranged at the upper end of the supporting rod, and a vertical guide rod is arranged at the end part of the supporting rod. The measuring head comprises a horizontally-arranged pressing rod, one end of the pressing rod is provided with a guide sleeve matched with the guide rod, the lower end of the pressing rod is provided with a pressing wheel matched with the outer wall of the bottle blank, a measuring rod penetrates through the pressing rod, the lower end of the measuring rod is provided with a feeler lever matched with the outer wall of the bottle blank, the feeler lever is located above the supporting strip, and the upper end of the measuring rod is provided with a handle. A graduated scale is arranged at the upper end of the pressing rod; a pointer for indicating the graduation is arranged on the side wall of the measuring rod; according to the utility model, through the cooperation of the supporting strip and the pressing wheel, the fixation of the bottle blank during measurement is realized, the stability of the bottle blank during the measurement process is ensured, and the measurement precision and convenience are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of preform detection, in particular to a device for detecting the wall thickness of plastic preforms. Background Art

[0002] A preform is formed by injecting raw materials into the gun mold of a mold at a specific temperature and pressure under the working conditions of an injection molding machine. After injection molding, it is a semi-finished product as an intermediate, and then becomes a final product through blow molding.

[0003] The wall thickness of a plastic preform directly affects the quality of the finished product. During preform production, product sampling inspection is required. Patent CN205981024U discloses a wall thickness gauge for plastic preforms. A measurement zeroing convex point 4a is provided on the side wall of the measuring rod 4, and the measurement zeroing convex point 4a forms a cooperation with the measuring head of the length measuring instrument 5 to realize the measurement of the wall thickness of the preform. For regular preforms with a constant inner diameter, the inside of the preform is only supported by the measurement zeroing convex point 4a. During the measurement process, the preform will inevitably tilt or slide, with poor stability, affecting the measurement accuracy. Content of the Utility Model

[0004] In view of the above-mentioned deficiencies existing in the prior art, the utility model provides a device for detecting the wall thickness of plastic preforms. Through the cooperation of a support bar and a pressure wheel, the preform is fixed during measurement, preventing the preform from tilting or moving during the measurement process, ensuring the stability of the preform during the measurement process, and improving the measurement accuracy and convenience.

[0005] To achieve the above object, the utility model provides the following technical solutions:

[0006] A device for detecting the wall thickness of plastic preforms includes a base and a measuring head. A column is provided at the upper end of the base. A support bar and a support rod for supporting the preform are provided on the side wall of the column. A support bar is provided at the upper end of the support rod, which is matched with the inner wall of the preform. A vertical guide rod is provided at the end of the support bar. The measuring head includes a horizontally arranged pressure rod. One end of the pressure rod is provided with a guide sleeve that cooperates with the guide rod. A pressure wheel that cooperates with the outer wall of the preform is provided at the lower end of the pressure rod. A measuring rod penetrates through the pressure rod. A contact rod that cooperates with the outer wall of the preform is provided at the lower end of the measuring rod. The contact rod is located above the support bar. A handle is provided at the upper end of the measuring rod. A scale is provided at the upper end of the pressure rod. A pointer for indicating the scale is provided on the side wall of the measuring rod.

[0007] Preferably, a positioning ring is sleeved outside the support rod. A positioning bolt is provided on the side wall of the positioning ring. A positioning plate for limiting the end of the preform is provided at the end of the positioning ring.

[0008] Preferably, the support bar is a long bar with a semi-circular cross-section.

[0009] Preferably, the number of the pressing wheels is two, and the two pressing wheels are located on both sides of the supporting bar.

[0010] Preferably, an upper limit ring and a lower limit ring are sleeved on the outer side of the measuring rod. The upper limit ring and the lower limit ring are respectively located on the upper and lower sides of the pressing rod, and a spring is connected between the upper limit ring and the pressing rod.

[0011] Preferably, the pressing wheel is close to the end of the supporting rod.

[0012] Preferably, when the contact rod contacts the supporting bar, the pointer points to the "0" scale line.

[0013] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0014] 1. Through the cooperation of the supporting bar and the pressing wheel, the present utility model realizes the fixation of the preform during measurement, prevents the preform from tilting or moving during measurement, ensures the stability of the preform during measurement, and improves the measurement accuracy and convenience.

[0015] 2. The present utility model connects the upper limit ring and the pressing rod through a spring, and the handle can be used to realize the pressing and measurement of the preform through the linkage of the spring, which improves the convenience of measurement and is convenient and fast to use.

[0016] 3. The present utility model can position the end of the preform through the positioning ring, which improves the accuracy of the measurement position. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a structural schematic diagram of the present utility model;

[0018] Figure 2 is a front view of the present utility model when in use;

[0019] Figure 3 is a structural schematic diagram of the measuring head;

[0020] In the figure: 1 - base; 2 - column; 201 - support rod; 202 - guide rod; 3 - support rod; 301 - positioning ring; 302 - support bar; 303 - positioning bolt; 304 - positioning plate; 4 - measuring head; 401 - guide sleeve; 402 - pressing rod; 403 - scale; 404 - pointer; 405 - handle; 406 - upper limit ring; 407 - spring; 408 - pressing wheel; 409 - contact rod; 410 - lower limit ring; 411 - measuring rod. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0022] As Figure 1 shown, a wall thickness detection device for plastic preforms mainly aims at regular preforms with unchanged inner diameters, and it includes a base 1 and a measuring head 4. A column 2 is provided at the upper end of the base 1. A support rod 201 and a support rod 3 for supporting the preform are provided on the side wall of the column 2. The support rod 3 is cylindrical. A support strip 302 for cooperating with the inner wall of the preform is provided at the upper end of the support rod 3. A vertical guide rod 202 is provided at the end of the support rod 201. As Figure 3 shown, the measuring head 4 includes a horizontally arranged pressing rod 402. A guide sleeve 401 for cooperating with the guide rod 202 is provided at one end of the pressing rod 402. A pressing wheel 408 for cooperating with the outer wall of the preform is provided at the lower end of the pressing rod 402. The pressing wheel 408 presses the side wall of the preform. A measuring rod 411 penetrates through the pressing rod 402. The measuring rod 411 is close to the pressing wheel 408. A contact rod 409 for cooperating with the outer wall of the preform is provided at the lower end of the measuring rod 411. The contact rod 409 is located above the support strip 302. A handle 405 is provided at the upper end of the measuring rod 411. A scale 403 is provided at the upper end of the pressing rod 402. A pointer 404 for indicating the scale is provided on the side wall of the measuring rod 411.

[0023] An upper limit ring 406 and a lower limit ring 410 are sleeved outside the measuring rod 411. The upper limit ring 406 and the lower limit ring 410 are respectively located on the upper and lower sides of the pressing rod 402. A spring 407 is connected between the upper limit ring 406 and the pressing rod 402. By pressing down the measuring rod 411 through the handle 405, the spring 407 can be compressed to make the contact rod 409 contact the preform to realize measurement. At the same time, under the action of the spring 407, the pressing wheel 408 presses the preform to ensure the stability of the preform during the measurement process. When the measuring rod 411 is pulled upward through the handle 405, the lower limit ring 410 cooperates with the pressing rod 402 to lift the pressing rod 402 to realize the disassembly and assembly of the preform.

[0024] As Figure 2 shown, a positioning ring 301 is sleeved outside the support rod 3. A positioning bolt 303 is provided on the side wall of the positioning ring 301. A positioning plate 304 for limiting the end of the preform is provided at the end of the positioning ring 301. By adjusting the positioning ring 301, the horizontal measurement position of the preform can be controlled.

[0025] The support strip 302 is a long strip rod with a semi-circular cross section.

[0026] There are two pressing wheels 408, and the two pressing wheels 408 are located on both sides of the supporting bar 302, which improves the firmness of fixing the preform and can also ensure the rotation of the preform to achieve circumferential measurement.

[0027] The pressing wheel 408 is close to the end of the supporting rod 3. As the depth of the preform sleeved on the supporting rod 3 increases, it can measure from the bottle mouth end to the bottle bottom direction, increasing the measurement range.

[0028] When the contact rod 409 contacts the supporting bar 302, the pointer 404 points to the "0" scale line. After determining the measurement position, fix the positioning ring 301 through the positioning bolt 303, lift the measuring head 4 through the handle 405, sleeve the preform on the outside of the supporting rod 3, and the end of the preform abuts against the positioning plate 304. The preform is supported by the supporting bar 302 under the action of gravity. Press down the handle 405, and the pressing wheel 408 first presses the side wall of the preform. Continue to press down to make the contact rod 409 contact the outer wall of the preform. At this time, the reading of the pointer 404 is the thickness of the preform.

[0029] Obviously, those skilled in the art can make various modifications and variations to the present utility model without departing from the spirit and scope of the present utility model. Thus, if these modifications and variations of the present utility model fall within the scope of the claims of the present utility model and their equivalent technologies, the present utility model is also intended to include these modifications and variations.

Claims

1. A plastic preform wall thickness detection device, comprising a base and a measuring head. A column is provided at the upper end of the base, and a support rod and a support rod for supporting the preform are provided on the side wall of the column. It is characterized in that: The upper end of the supporting rod is provided with a supporting strip that fits the inner wall of the preform. The end of the supporting rod is provided with a vertical guiding rod. The measuring head includes a horizontally arranged pressing rod. One end of the pressing rod is provided with a guiding sleeve that fits the guiding rod. The lower end of the pressing rod is provided with a pressing wheel that fits the outer wall of the preform. A measuring rod penetrates through the pressing rod. The lower end of the measuring rod is provided with a contact rod that fits the outer wall of the preform. The contact rod is located above the supporting strip. The upper end of the measuring rod is provided with a handle. The upper end of the pressing rod is provided with a scale. A pointer indicating the scale is provided on the side wall of the measuring rod.

2. The wall thickness detection device for plastic preforms according to claim 1, wherein: A positioning ring is sleeved outside the supporting rod. A positioning bolt is provided on the side wall of the positioning ring. A positioning plate for limiting the end of the preform is provided at the end of the positioning ring.

3. The wall thickness detection device for plastic preforms according to claim 1, characterized in that: The supporting strip is a long strip rod with a semi-circular cross-section.

4. The wall thickness detection device for plastic preforms according to claim 1, characterized in that: The number of the pressing wheels is two, and the two pressing wheels are located on both sides of the supporting strip.

5. The wall thickness detection device for plastic preforms according to claim 1, characterized in that: An upper limit ring and a lower limit ring are sleeved outside the measuring rod. The upper limit ring and the lower limit ring are respectively located on the upper and lower sides of the pressing rod. A spring is connected between the upper limit ring and the pressing rod.

6. The wall thickness detection device for plastic preforms according to claim 1, wherein: The pressing wheel is close to the end of the supporting rod.

7. The wall thickness detection device for plastic preforms according to claim 1, characterized in that: When the contact rod contacts the supporting strip, the pointer points to the "0" scale line.

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