Plastic cup stretching head

Abstract

The utility model relates to the technical field of plastic cup processing, in particular to a plastic cup stretching head which comprises a supporting base and a stretching handle connected with the supporting base, the supporting base is of a hollow structure, a hollow through groove is formed in the lower portion of the stretching handle, the supporting base is arranged in the through groove, and the stretching handle is connected with the supporting base. A gap is reserved between the top of the through groove and the top of the through groove; a plurality of air hole channels are formed in the side wall of the stretching handle and are communicated with the through groove; a plurality of air hole channels are formed in the side wall of the stretching handle, so that air can be exhausted in time, and the forming quality of the cup is prevented from being influenced.

Description

Technical Field

[0001] The utility model relates to the technical field of plastic cup processing, and more specifically, to a plastic cup stretching head. Background Art

[0002] During the production process of a cup-making machine, in order to manufacture different cup shapes, a stretching head is often required. The stretching head of the cup-making machine mold is a mold component used to manufacture plastic cups. It can be used to stretch and form a heated plastic sheet into the shape of a cup. However, the existing stretching head is generally cylindrical and made of PEEK material. It not only has a high cost but also poor air permeability, and bubbles are likely to be generated at the bottom of the cup during the stretching process, thus damaging the shape of the cup and affecting the production efficiency of the enterprise. Summary of the Utility Model

[0003] The purpose of the utility model is to provide a plastic cup stretching head, which is provided with a plurality of air hole channels on the side wall of the stretching handle, so that air can be exhausted in time to avoid affecting the forming quality of the cup.

[0004] The embodiments of the utility model are realized by the following technical solutions:

[0005] A plastic cup stretching head includes a support base and a stretching handle connected to the support base. The support base has a hollow structure. A hollow through groove is provided at the lower part of the stretching handle. The support base is arranged in the through groove and has a gap with the top of the through groove.

[0006] A plurality of air hole channels are provided on the side wall of the stretching handle, and the air hole channels communicate with the through groove.

[0007] Further, the air hole channels are inclined along the surface of the stretching handle.

[0008] Further, the inclination angle between the air hole channels and the stretching handle is 30 - 60°.

[0009] Further, the through groove includes a first through groove and a second through groove arranged coaxially, and the first through groove and the second through groove are connected. The inner diameter of the first through groove is larger than that of the second through groove. The support base includes an outer peripheral part and a reduced diameter part integrally arranged, and the reduced diameter part is arranged in the second through groove.

[0010] Further, at least one row of air hole channels is arranged along the circumferential surface of the side wall of the stretching handle, and one row of air hole channels communicates with the first through groove and / or the second through groove respectively.

[0011] Further, two rows of the air hole channels are arranged along the circumferential surface of the side wall of the stretching handle, and one row of the air hole channels is respectively communicated with the first through groove and the second through groove; and the two adjacent air hole channels in the upper and lower rows of the air hole channels are arranged in a staggered manner.

[0012] Further, a connecting groove is formed in the center of the upper part of the stretching handle.

[0013] Further, the outer diameter of the peripheral part is not less than the outer diameter of the stretching handle.

[0014] Further, the outer circumferential surface of the peripheral part is in an arc transition.

[0015] Further, the support base and the stretching handle are coaxially arranged.

[0016] Further, the support base is made of PEEK material, and the stretching handle is made of aluminum alloy material.

[0017] The technical solution of the embodiment of the present utility model has at least the following advantages and beneficial effects:

[0018] The present utility model is reasonably designed and has a simple structure. When the stretching head is in use, one side of the support base of the stretching head is used as the head end to act on the surface of the plastic sheet, and the plastic sheet is subjected to vacuum forming and stretching so that the plastic sheet is made into a cup shape in the vacuum forming process; and the connecting groove in the upper part of the stretching handle is used to connect with the driving part, so as to apply a force to the stretching head to perform stamping and stretching on the plastic sheet; the existing stretching heads are basically cylindrical, and it is easy to generate bubbles after acting on the plastic sheet due to heat; in the present utility model, the centers of the stretching handle and the support base are both formed into a hollow shape, and a plurality of air hole channels are formed in the side wall of the stretching handle, so that the exhaust can be carried out in time to avoid the influence of bubbles on the plastic sheet and affect the forming quality of the cup. Description of the Drawings

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following will briefly introduce the drawings required to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the present utility model, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can also be obtained according to these drawings without creative efforts.

[0020] Figure 1 It is a schematic structural diagram of the plastic cup stretching head provided by the embodiment of the present utility model;

[0021] Figure 2 is Figure 1 a cross-sectional view taken along the line A-A in

[0022] Icon: 1 - support base, 11 - peripheral part, 12 - necking part, 2 - through groove, 21 - first through groove, 22 - second through groove, 3 - stretching handle, 4 - air hole channel, 5 - connecting groove. Detailed implementation

[0023] To make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are some but not all of the embodiments of the present utility model. Generally, the components of the embodiments of the present utility model described and illustrated in the drawings here can be arranged and designed in various different configurations.

[0024] Embodiment 1

[0025] A plastic cup stretching head includes a support base 1 and a stretching handle 3 connected to the support base 1. A connecting groove 5 is provided at the center of the upper part of the stretching handle 3. The center of the support base 1 is of a hollow structure. A hollow through groove 2 is provided at the lower part of the stretching handle 3. The support base 1 is arranged in the through groove 2 and there is a gap with the top of the through groove 2. A plurality of air hole channels 4 are provided on the side wall of the stretching handle 3, and the air hole channels 4 communicate with the through groove 2.

[0026] Working principle: When the stretching head of the present utility model is in use, one side of the support base 1 of the stretching head is used as the head end to act on the surface of the plastic sheet, and the plastic sheet is subjected to vacuum forming and stretching so that the plastic sheet is formed into a cup shape in the vacuum forming process. The connecting groove 5 at the upper part of the stretching handle 3 is used to connect with the driving part, so as to apply a force to the stretching head to perform stamping and stretching on the plastic sheet. The existing stretching heads are basically cylindrical. After acting on the plastic sheet, bubbles are easily generated due to heat. In the present utility model, the centers of the stretching handle 3 and the support base 1 are both provided in a hollow shape, and a plurality of air hole channels 4 are provided on the side wall of the stretching handle 3, so that air can be exhausted in time to avoid the influence of bubbles on the plastic sheet and affect the forming quality of the cup.

[0027] In this embodiment, the air hole channels 4 are arranged obliquely along the surface of the stretching handle 3. Preferably, the inclination angle between the air hole channels 4 and the stretching handle 3 is 30 - 60°. In this embodiment, the inclination angle is 45°, which is convenient for the generated bubbles to be more smoothly squeezed out and shortens the retention time of the bubbles in the stretching head.

[0028] In this embodiment, the through groove 2 includes a first through groove 21 and a second through groove 22 which are coaxially arranged, and the hollow structures of the first through groove 21, the second through groove 22 and the support base 1 are all communicated. The inner diameter of the first through groove 21 is larger than that of the second through groove 22. The support base 1 includes an outer peripheral portion 11 and a necking portion 12 which are integrally arranged. The necking portion 12 is arranged in the second through groove 22. In the process of thermoforming and stretching the plastic sheet, if air bubbles are generated, they can flow out through the hollow structure in the center of the support base 1, and then be discharged through the air hole channels 4 on the side walls of the first through groove 21 and the second through groove 22. In addition, the inner diameter of the first through groove 21 is larger than that of the second through groove 22, so that necking flow can be formed to accelerate the rapid discharge of gas, making the thermoforming and stretching process smoother, avoiding the influence of air bubbles on the plastic sheet, that is, avoiding the influence on the quality of the obtained plastic cup product.

[0029] In this embodiment, at least one row of the air hole channels 4 is arranged along the circumferential surface of the side wall of the stretching handle 3, and one row of the air hole channels 4 is respectively communicated with the first through groove 21 and / or the second through groove 22, so that the discharge path of the gas is smoother and faster. Preferably, two rows of the air hole channels 4 are arranged along the circumferential surface of the side wall of the stretching handle 3, and one row of the air hole channels 4 is respectively communicated with the first through groove 21 and the second through groove 22, and the two adjacent air hole channels 4 in the upper and lower rows of the two rows of the air hole channels 4 are arranged in a staggered manner, so that the flow direction of the gas is more uniform and more, and thus the gas can be discharged more quickly.

[0030] In this embodiment, the outer diameter of the outer peripheral portion 11 of the support base 1 is not less than the outer diameter of the stretching handle 3. The outer peripheral portion 11 contacts the plastic sheet first for thermoforming and stretching, so that the bottom of the plastic cup can be thermoformed and stretched.

[0031] In this embodiment, the outer circumferential surface of the outer peripheral portion 11 is in an arc transition, so that the forming of the bottom of the plastic cup is smoother and more beautiful.

[0032] In this embodiment, the support base 1 and the stretching handle 3 are coaxially arranged.

[0033] In this embodiment, the support base 1 is made of PEEK material, and the stretching handle 3 is made of aluminum alloy material, which reduces the cost and has more stable use and longer service life.

[0034] The above are only the preferred embodiments of the present invention and are not used to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A plastic cup stretching head, characterized in that, It includes a support base and a stretching handle connected to the support base. The support base has a hollow structure. A hollow through groove is provided at the lower part of the stretching handle. The support base is arranged in the through groove and has a gap with the top of the through groove. A plurality of air hole channels are formed in the side wall of the stretching handle, and the air hole channels communicate with the through groove.

2. The plastic cup stretching head according to claim 1, wherein The air hole channels are arranged obliquely along the surface of the stretching handle.

3. The plastic cup stretching head according to claim 2, wherein, The inclination angle between the air hole channels and the stretching handle is 30-60°.

4. The plastic cup stretching head according to claim 1, wherein The through groove includes a first through groove and a second through groove arranged coaxially, and the first through groove and the second through groove are communicated with each other. The inner diameter of the first through groove is larger than that of the second through groove. The support base includes an outer peripheral part and a necking part integrally arranged, and the necking part is arranged in the second through groove.

5. The plastic cup stretching head according to claim 4, characterized in that, The air hole channels are arranged at least in one row along the circumferential surface of the side wall of the stretching handle, and one row of the air hole channels communicate with the first through groove and / or the second through groove respectively.

6. The plastic cup stretching head according to claim 5, characterized in that, The air hole channels are arranged in two rows along the circumferential surface of the side wall of the stretching handle. One row of the air hole channels communicate with the first through groove and the second through groove respectively; and the upper and lower adjacent air hole channels of the two rows of the air hole channels are arranged in a staggered manner.

7. The plastic cup stretching head according to claim 4, characterized in that, The outer diameter of the outer peripheral part is not less than the outer diameter of the stretching handle.

8. The plastic cup stretching head according to claim 4, characterized in that, The outer circumferential surface of the outer peripheral part has an arc transition.

9. The plastic cup stretching head according to claim 1, wherein The support base and the stretching handle are arranged coaxially.

10. The plastic cup stretching head according to claim 1, characterized in that, The support base is made of PEEK material, and the stretching handle is made of aluminum alloy material.

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