Plastic vacuum forming machine for plastic tray production

Abstract

The utility model relates to a plastic vacuum forming machine, in particular to a plastic vacuum forming machine for plastic tray production, which comprises a high-pressure air pump and a vacuum hole self-cleaning mechanism, the vacuum hole self-cleaning mechanism comprises a filter screen, the filter screen is mounted in an annular block, a center block is mounted at the center of the filter screen, a slider is arranged on the side wall of a counterbore, an annular groove is arranged on the side wall of the annular block, and the slider is mounted in the annular groove. The lower end face of the center block is rotationally connected with a center shaft, the lower end face of the center shaft is fixedly connected with blades, bristles are arranged on the side of the center shaft, the filter screen mounting mechanism comprises a mounting column, and the lower end of the mounting column is fixedly connected with a circular-truncated-cone-shaped electromagnet; when high-speed airflow passes through the vacuum holes, the blades are driven to rotate, then the center shaft is driven to rotate, and the brushes on the center shaft rotate and clean chippings and impurities attached to the hole walls of the vacuum holes. The vacuum hole and the vacuum hole self-cleaning mechanism are small, and the vacuum hole self-cleaning mechanism can be easily and accurately mounted and dismounted by arranging the filter screen mounting mechanism and a sliding block for limiting the vacuum hole self-cleaning mechanism.

Description

TECHNICAL FIELD

[0001] The utility model relates to a plastic uptake machine, concretely is a plastic uptake machine for plastic tray production. BACKGROUND

[0002] The plastic uptake machine is a common plastic tray processing equipment in the prior art, which mainly heats and softens a plate-shaped material, passes through a vacuum hole on a mold, controls the vacuum degree between the plate-shaped material and the mold, makes the plate-shaped material adhere to a forming surface of the mold, cools the material, and then obtains a formed product through cutting, trimming and shaping steps.

[0003] The vacuum hole is easily blocked after the existing equipment works for a period of time, so that the required vacuum degree cannot be reached in the production process, thereby causing forming failure. In order to avoid the vacuum hole from being blocked, sometimes it is necessary to stop the machine to clean the vacuum hole. Since the vacuum hole is small, manual cleaning is time-consuming and laborious, which causes waste of manpower and time. UTILITY MODEL CONTENT

[0004] The utility model aims at providing a plastic uptake machine with a vacuum hole self-cleaning mechanism and capable of mechanically installing the vacuum hole self-cleaning mechanism, so as to solve the problems in the above background.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: a plastic uptake machine for plastic tray production, comprising a vacuum pump and a single-sided mold, a vacuum hole of the single-sided mold is communicated with a countersunk hole, an annular block is arranged in the countersunk hole, a filter screen is arranged on the upper and lower symmetrical surfaces of the annular block, a center block is arranged at the center of the filter screen, the center block is fixedly connected with the annular block through a connecting block, an annular groove is formed on the outer wall of the annular block, the annular groove corresponds to a sliding block, the sliding block is arranged in the side wall of the countersunk hole, and a spring is arranged between one end of the sliding block and a sliding block cavity.

[0006] Further comprising a filter screen mounting mechanism, the filter screen mounting mechanism comprises a mounting column, the upper end surface of the mounting column is fixedly connected with a mounting plate, the lower end of the mounting column is provided with an electromagnet, and the upper end surface of the mounting plate is fixedly connected with the output end of a lead screw guide rail mechanism;

[0007] The free end of the sliding block is a strong magnet, the center block is a soft magnetic material, and the annular block and the connecting block are made of aluminum.

[0008] Preferably, an annular shock pad is arranged on the bottom surface of the countersunk hole.

[0009] Preferably, the electromagnet is in the shape of an inverted circular truncated cone, the upper end diameter of the electromagnet is smaller than the inner diameter of the annular block, and the lower end diameter of the electromagnet is equal to the diameter of the center block.

[0010] Preferably, a high-pressure air pump is further included, which is communicated with the vacuum hole through a pipeline.

[0011] Preferably, the lower end of the annular block is rotationally connected with a central shaft, the lower end surface of the central shaft is fixedly connected with a blade, and brush hairs are arranged on the circumferential surface of the central shaft.

[0012] Compared with the prior art, the vacuum hole self-cleaning mechanism has the following beneficial effects:

[0013] 1. The filter screen is arranged on the vacuum hole, so that the debris generated in the production process of the plastic suction machine is reduced to enter the vacuum hole, and the possibility of vacuum hole blockage is reduced.

[0014] 2. The high-pressure air pump is communicated with the vacuum hole, and the high-speed airflow is controlled by the electromagnetic valve to blow and brush the filter screen and clean the plastic debris stuck in the filter screen.

[0015] 3. When the high-speed airflow passes through the vacuum hole, the blade is driven to rotate, and the central shaft is driven to rotate, the brush on the central shaft is driven to rotate and clean the debris and impurities attached to the wall of the vacuum hole, and the possibility of vacuum hole blockage is reduced.

[0016] 4. The work of blowing and brushing the filter screen by the high-speed airflow and rotating and cleaning the wall of the vacuum hole by the brush can be completed in the gap of the production of the plastic suction machine, and the machine does not need to be stopped.

[0017] 5. The vacuum hole and the vacuum hole self-cleaning mechanism are relatively small, the filter screen mounting mechanism and the slide block limiting the annular block can easily and accurately complete the installation and disassembly of the vacuum hole self-cleaning mechanism. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 The overall schematic view of the present application;

[0019] Figure 2 The schematic view of the vacuum hole self-cleaning mechanism after planing and cutting the single-sided mold of the present application;

[0020] Figure 3 The present application Figure 2 The enlarged view of A in the middle;

[0021] Figure 4 The partial schematic view of the filter screen mounting mechanism of the present application.

[0022] In the figure: single-sided mold 1, filter screen mounting mechanism 2, vacuum hole 3, annular block 4, filter screen 5, central block 6, connecting block 7, annular groove 8, slide block 9, spring 10, mounting column 11, mounting plate 12, electromagnet 13, central shaft 14, blade 15, brush hair 16. DETAILED DESCRIPTION

[0023] Clearly, the described embodiments are merely a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all the other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0024] Please refer to Figures 1 to 4 The utility model provides a kind of technical scheme: a blister machine for plastic tray production, including vacuum pump (not shown in drawing) and single-sided mould 1, vacuum pump is communicated with vacuum hole 3 by pipeline (not shown in drawing), the vacuum hole 3 of single-sided mould 1 is communicated with counterbore, annular block 4 is movably installed in counterbore, filter screen 5 is installed at the upper and lower symmetrical surface of annular block 4, center block 6 is equipped at the center of filter screen 5, center block 6 is fixedly connected with annular block 4 by connecting block 7, annular recess 8 is formed on the outer side wall of annular block 4, annular recess 8 corresponds with sliding block 9, the free end of sliding block 9 can be machined into upper and lower symmetrical inclined plane or circular arc surface, to facilitate sliding block 9 clamping into recess or disengaging from recess, sliding block 9 is arranged in the side wall of counterbore, sliding block cavity that is matched with sliding block 9 is formed in the side wall of counterbore, spring 10 is arranged between the free end of sliding block 9 and the opposite end of sliding block 9, and the sliding block 9 is provided with four groups in the application;

[0025] It further includes filter screen mounting mechanism 2, and the filter screen mounting mechanism 2 includes mounting column 11, the upper end surface of the mounting column 11 is fixedly connected with mounting plate 12, the lower end of the mounting column 11 is provided with electromagnet 13, the upper end surface of the mounting plate 12 is fixedly connected with the output end of linear actuator (not shown in drawing), the linear actuator can adopt telescopic air cylinder or screw rod guide rail in the prior art, to realize accurate positioning and up-down movement of the mounting plate 12, and the screw rod guide rail mechanism is a commonly used device in numerical control processing equipment, which is prior art, and will not be described here any more; in addition, it should be noted that the mounting plate 12 cannot interfere with the mould or other components (such as plastic plate clamping device, tensioning device, etc.) when being close to or away from the mould, and the shape of the mounting plate 12 needs to be designed according to the specific shape of the mould and the mounting condition of other components.

[0026] The free end of the sliding block 9 is a strong magnet, and the strong magnet of the free end of the sliding block 9 repels the electromagnet 13 during the process of being close to the electromagnet 13 after the electromagnet 13 is electrified, so that the sliding block 9 compresses the spring 10 and retracts into the sliding block 9 cavity, thereby disengaging the limiting of the annular block 4.

[0027] The center block 6 is made of soft magnetic material, which can be pure iron (soft iron), silicon steel (electrical steel), nickel-iron alloy, cobalt-based alloy, iron-aluminum alloy, iron-silicon-aluminum alloy, etc. The center block 6 is made of soft magnetic material, and the magnetic property of the center block 6 will disappear quickly after the installation of the filter screen 5, so as not to affect other components.

[0028] The ring block 4 and the connecting block 7 are made of aluminum, and can also be made of copper, ceramic or plastic that can withstand high temperature and other suitable magnetic transparent materials. The magnetic field can easily penetrate, and thus will not affect the interaction between the electromagnet 13 and the strong magnet at the free end of the sliding block 9.

[0029] In the present application, the electromagnet 13 is in the shape of an inverted circular truncated cone. The upper end of the electromagnet 13 has a diameter smaller than the inner diameter of the ring block 4, and the lower end of the electromagnet 13 has a diameter equal to that of the center block 6. After the electromagnet 13 is energized, the lower end surface of the electromagnet 13 will be completely attached to the upper end surface of the center block 6 inside the ring block 4 under the action of magnetic force, thereby playing the role of automatic centering during the installation of the filter screen 5.

[0030] The bottom surface of the counterbore is provided with an annular shock-absorbing pad (not shown in the figure), which is made of high-temperature-resistant material, such as graphite-reinforced shock-absorbing pad, metal fiber composite shock-absorbing pad, ceramic fiber shock-absorbing pad, etc. During installation, slight positioning errors of the filter screen 5 installation mechanism will not cause damage to the filter screen 5 and its components.

[0031] It also includes a high-pressure air pump (not shown in the figure), which is connected to the vacuum hole 3 through a pipeline and a solenoid valve (not shown in the figure). The lower end of the center shaft 14 is rotatably connected to the lower end of the ring block 4. The lower end surface of the center shaft 14 is fixedly connected to the blade 15. The circumferential surface of the center shaft 14 is provided with brush hairs 16, which are arranged vertically in strips. The brush hairs 16 are symmetrical and made of flexible high-temperature-resistant material, such as silicon carbide, metal wire, ceramic fiber, etc.

[0032] When the utility model is used, the electromagnet 13 is electrified, the vacuum hole self-cleaning mechanism is adsorbed on the electromagnet 13, then the filter screen device is controlled to move downwards and gradually enters the counterbore, when the electromagnet 13 enters the counterbore and gradually approaches the slider 9, the strong magnet on the free end of the slider 9 and the electromagnet 13 repel each other, and then the slider 9 retracts into the slider cavity, then the annular block 4 of the vacuum hole self-cleaning mechanism completely enters the counterbore, then the electromagnet 13 is deenergized, the magnetic force disappears, the filter screen device is lifted and reset, when the magnetic force of the electromagnet 13 disappears, the slider 9 is reset and clamped into the annular groove 8 on the sidewall of the annular block 4 under the action of the spring 10, the vacuum hole self-cleaning mechanism is positioned, and thus the installation of the vacuum hole self-cleaning mechanism is completed; during the working process of the plastic suction machine, the filter screen 5 can block the plastic fragments from entering the vacuum hole 3, after the plastic suction machine works for a certain period of time, the high-pressure air pump is started, the electromagnetic valve is opened, the high-pressure airflow blows away the plastic fragments clamped in the filter screen 5, when the high-pressure airflow flows in the vacuum hole 3, the blade 15 is driven to rotate, and then the central shaft 14 is driven to rotate, the bristles 16 on the central shaft 14 are driven to rotate, and the impurities adhered to the hole wall of the vacuum hole 3 are brushed off; when the vacuum hole self-cleaning mechanism is replaced, the filter screen device moves downwards, the lower end of the electromagnet 13 contacts the central block 6 of the vacuum hole self-cleaning mechanism, then the electromagnet 13 is electrified, the electromagnet 13 adsorbs the central block 6, at the same time, the slider 9 moves backwards under the action of the magnetic force and retracts into the slider cavity, then the filter screen 5 installation device is lifted and reset, and at the same time, the vacuum hole self-cleaning mechanism is also lifted and moved upwards with the filter screen installation mechanism 2 under the action of the magnetic force, and thus the disassembly of the vacuum hole self-cleaning mechanism is completed.

[0033] Although the embodiments of the utility model have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and modifications can be made to the embodiments without departing from the principles and spirits of the utility model, and the scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. A blister machine for plastic tray production comprising a vacuum pump and a single-sided mold (1), characterized by: The application relates to a vacuum hole self-cleaning mechanism, which comprises a filter screen (5) installed on the upper and lower symmetrical surfaces of a ring-shaped block (4) which is movably installed in a counterbore hole communicated with a vacuum hole (3) of a single-sided mold (1), a center block (6) arranged at the center of the filter screen (5), a connecting block (7) fixedly connected with the ring-shaped block (4), a ring-shaped groove (8) formed on the outer side wall of the ring-shaped block (4) and corresponding to a sliding block (9), a spring (10) arranged between one end of the sliding block (9) and a sliding block cavity, a filter screen mounting mechanism (2) comprising a mounting column (11) and a mounting plate (12) fixedly connected with the upper end surface of the mounting column (11), and an electromagnet (13) arranged at the lower end of the mounting column (11). The free end of the sliding block (9) is a strong magnet, the center block (6) is a soft magnetic material, and the ring-shaped block (4) and the connecting block (7) are made of aluminum. An annular damping pad is arranged on the bottom surface of the counterbore hole.

2. A blister machine for the production of plastic trays according to claim 1, characterized in that: The electromagnet (13) is in the shape of an inverted circular truncated cone, the upper end diameter of the electromagnet (13) is smaller than the inner diameter of the ring-shaped block (4), and the lower end diameter of the electromagnet (13) is equal to the diameter of the center block (6).

3. A blister machine for the production of plastic trays according to claim 1, characterized in that: A high-pressure air pump is further arranged and communicated with the vacuum hole (3) through a pipeline.

4. A blister machine for the production of plastic trays according to claim 1, characterized in that: The lower end surface of a center shaft (14) is fixedly connected with a blade (15), the circumferential surface of the center shaft (14) is provided with brush hairs (16), the brush hairs (16) are vertically arranged in strips, and the brush hairs (16) are arranged in two groups and are symmetrical.

5. A blister machine for the production of plastic trays according to claim 3, characterized in that: ​

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