CN218429920U

CN218429920U - Thermoforming device with rotary demolding structure

Info

Publication number: CN218429920U
Application number: CN202223169507.9U
Authority: CN
Inventors: 魏育南; 魏珏淇
Original assignee: Guangdong Huasheng Meto Green Tech Holdings Ltd
Current assignee: Guangdong Huasheng Meto Green Tech Holdings Ltd
Priority date: 2022-11-29
Filing date: 2022-11-29
Publication date: 2023-02-03
Anticipated expiration: 2032-11-29

Abstract

The utility model discloses a thermal forming device with a rotary demoulding structure, which comprises an upper template and a lower template arranged below the upper template in a liftable way, wherein a material pressing ring is inserted into the inner cavity of the upper template in a sliding way, demoulding cup sleeves are respectively and rotatably arranged in the inner cavity of the lower template, the top surface of each demoulding cup sleeve is provided with a forming cavity, the bottom of each demoulding cup sleeve is respectively and fixedly provided with a screw rod sleeve, and each demoulding cup sleeve penetrates through the forming cavity from the bottom surface and is provided with a through hole; the lower die plate is telescopically provided with a top cup plate below the lower die plate, a plurality of lead screws in threaded connection with the lead screw sleeves are respectively arranged on the top cup plate, the top of each lead screw is fixedly provided with a demolding cup bottom, the top cup plate drives the lead screws to support a container when ascending, and meanwhile, the lead screws drive the demolding cup sleeves to rotate under the action of linear motion of the lead screws. The utility model discloses utilize the rotation of the linear motion linkage drawing of patterns glass holder of lead screw, carry out the rotatory drawing of patterns when realizing holding up the container, simplified the structure of rotatory drawing of patterns greatly, reduce the manufacturing cost of plastic container.

Description

Thermoforming device with rotary demolding structure

Technical Field

The utility model relates to a thermoforming mould's technical field, in particular to thermoforming device with rotatory demoulding structure.

Background

In order to prevent the articles from falling off or prevent water, air, and the like from entering the containers, most containers use a cover to enclose the inner space of the container. The container cover and the container have various connection and fastening modes, such as a clamping connection mode, a screw cap threaded connection mode and the like.

The traditional demoulding mode of the existing thermoforming machine for producing plastic containers is completed by linearly ejecting the containers by using thimbles or pressing plates, for example, the publication number is CN201693742U, the utility model discloses a Chinese patent publication of 'a thimble secondary ejection mechanism for demoulding products with buckles', wherein after a mould is opened, an upper thimble plate and a lower thimble plate are ejected upwards, a first thimble moves upwards simultaneously, after the distance traveled by the first thimble, the first thimble is limited by a male mould plate, the upper thimble plate and the lower thimble plate continue to move upwards, at this time, a product buckling part is filled by injection moulding and slowly breaks away from the first thimble, and finally, when a second thimble moves away, the buckling part is completely broken away. However, for products with complicated shape structures, such as containers using screw-cap closures, the outer wall or inner wall of the container generally has a protrusion (such as a spiral line), and the protrusion extends in a direction different from the ejection direction of the container during the demolding process, so that during the demolding process of the molded container, an additional rotational force is required to rotate the molded container during the ejection process, thereby completing the rotational demolding of the molded container.

However, for the product with a complicated shape structure, the demolding mode in the prior art is generally completed by using an additional manipulator, or a structure with a complicated design, such as an oil cylinder, a gear and the like, is used for completing the rotary demolding. The demolding modes are complex in structure, multiple in action and high in cost, the production cost of the plastic container is greatly increased, and the operation difficulty and the maintenance cost are also increased.

SUMMERY OF THE UTILITY MODEL

The embodiment of the utility model provides a technical problem that will solve lies in, provides a hot forming device with rotatory demoulding structure, utilizes the rotation of the linear motion linkage drawing of patterns glass holder of lead screw, carries out rotatory drawing of patterns when realizing holding up the container, has simplified the structure of rotatory drawing of patterns greatly, reduces plastic container's manufacturing cost.

In order to achieve the purpose, the utility model discloses a thermoforming device with a rotary demolding structure, which comprises an upper template and a lower template arranged below the upper template in a liftable manner, wherein a plurality of inner cavities are arranged in the upper template and the lower template;

the lower die plate is telescopically provided with a top cup plate below the lower die plate, the top cup plate is respectively provided with a plurality of lead screws in threaded connection with lead screw sleeves, the tops of the lead screws penetrate through the through holes and extend to the bottom surface of the cavity, the tops of the lead screws are fixedly provided with demolding cup bottoms and used for supporting the bottom surface of the container in the forming cavity, the top cup plate is driven to support the container when ascending, and meanwhile, the lead screws are sleeved on the demolding cup sleeves and driven to rotate under the action of linear motion of the lead screws, so that the container is separated from the demolding cup sleeves.

Preferably, a connecting gasket is fixedly connected between the demolding cup sleeve and the screw rod sleeve.

Preferably, a stretching plate is telescopically arranged above the upper template, a plurality of stretching rods are fixedly arranged on the bottom surface of the stretching plate, the stretching rods are respectively inserted onto the upper template in a sliding manner, and a stretching head is fixedly arranged at the bottom of each stretching rod and used for stretching the sheet into the forming cavity.

Preferably, an upper shearing plate is fixedly arranged on the bottom surface of the upper template, a lower shearing plate is fixedly arranged on the top surface of the lower template, a plurality of upper through grooves communicated with the inner cavity of the upper template are respectively formed in the upper shearing plate, and a plurality of lower through grooves communicated with the inner cavity of the lower template are respectively formed in the lower shearing plate.

Preferably, an upper notch is formed in the upper through groove, a lower notch is formed in the lower through groove, a limiting ring groove is formed in one end of the upper template/lower template on the inner wall of the upper through groove/lower through groove, and limiting flanges in limiting fit with the limiting ring groove are respectively arranged on the upper notch and the lower notch.

Preferably, the outer wall of the upper part of the lower shear notch is gradually narrowed, so that the lower knife edge of the upper shear notch and the upper knife edge of the lower shear notch are matched with each other to cut sheets.

Preferably, the bottom of the lower template is fixedly provided with a plurality of guide rods, and the cup ejecting plate is fixedly provided with a plurality of limiting sleeves in sliding fit with the guide rods.

Preferably, the lower opening of the inner cavity of the upper template is provided with a limiting convex edge, and the upper part of the material pressing ring is provided with a stop convex edge matched with the limiting convex edge.

Compared with the prior art, the beneficial effects of the utility model reside in that:

the utility model discloses the linear motion who utilizes the lead screw makes the lead screw cover drive drawing of patterns glass holder rotatory for the container in the shaping intracavity is drawing of patterns and released under drawing of patterns glass holder rotation effect in by lead screw jack-up, compares in the current thimble of utilizing and to product back-off department drawing of patterns by force, and this application can prevent to the container drawing of patterns by force of spiral back-off, makes the product warp or damaged when avoiding the drawing of patterns, improves the qualification rate of product greatly.

Drawings

FIG. 1 is a perspective view of the overall structure of the present invention;

FIG. 2 is a side view of the overall structure of the present invention;

FIG. 3 is a sectional view of the whole structure of the present invention;

FIG. 4 is a schematic view of the overall structure of the knockout cup holder;

FIG. 5 is a schematic view showing a structure of a portion A in FIG. 3;

fig. 6 is a schematic view showing a structure of a portion B in fig. 3.

Detailed Description

To make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be further described in detail with reference to the accompanying drawings.

Referring to fig. 1-3, a thermoforming device with a rotary demolding structure includes an upper template 1 and a lower template 2 disposed below the upper template 1 in a liftable manner, a plurality of inner cavities are disposed in the upper template 1 and the lower template 2, a plurality of material pressing rings 3 are respectively inserted into the inner cavities of the upper template 1 in a sliding manner, a plurality of demolding cups 4 are rotatably disposed in the inner cavities of the lower template 2, a top surface of the demolding cup 4 has an inward recessed molding cavity 41 (as shown in fig. 5), an upper edge outer wall of the demolding cup 4 has an outward protruding spiral inverted buckle 44, and an upper edge outer wall of the demolding cup 4 has an inward recessed stop groove inverted buckle 45 (as shown in fig. 4) at the bottom of the spiral inverted buckle 44.

Referring to fig. 3 and 5, an upper shear plate 8 is fixedly arranged on the bottom surface of the upper template 1, a lower shear plate 9 is fixedly arranged on the top surface of the lower template 2, a plurality of upper through grooves communicated with the inner cavity of the upper template 1 are respectively arranged on the upper shear plate 8, a plurality of lower through grooves communicated with the inner cavity of the lower template 2 are respectively arranged on the lower shear plate 9, upper shear notches 81 are arranged in the upper through grooves, and lower shear notches 91 are arranged in the lower through grooves.

The inner wall of the upper/lower through groove is provided with a limit ring groove at one end of the upper template 1/lower template 2, the upper notch 81 and the lower notch 91 are respectively provided with a limit flange in limit fit with the limit ring groove, and the outer wall of the upper part of the lower notch 91 is gradually narrowed, so that the lower opening of the upper notch 81 and the upper opening of the lower notch 91 are matched to punch and shear sheets.

Specifically, after the sheet is heated and then sent into the space between the upper template 1 and the lower template 2, the lower template rises to enable the demolding cup sleeve 4 and the material pressing ring 3 to compress the sheet, meanwhile, the lower template 2 continues to move upwards until the upper notch 81 is contacted with the lower notch 91, in addition, the lower opening of the inner cavity of the upper template 1 in the embodiment is provided with a limiting convex edge, the upper part of the material pressing ring 3 is provided with a stop convex edge in limiting fit with the limiting convex edge, the material pressing ring 3 is prevented from being separated from the inner cavity of the upper template 1, and meanwhile, the material pressing ring 3 can slide along the inner cavity, so the pressure applied to the sheet by the material pressing ring 3 is effectively reduced.

The lower die plate may be controlled by hydraulic drive, pneumatic drive, or the like.

A stretching plate 7 is telescopically arranged above the upper template 1, a stretching driving device is fixedly arranged above the stretching plate 7, in this embodiment, an air cylinder is preferably adopted, a stretching end of the air cylinder is fixedly connected with the stretching plate 7, a plurality of stretching rods 71 are fixedly arranged on the bottom surface of the stretching plate 7, the stretching rods 71 are respectively inserted onto the upper template 1 in a sliding manner, and stretching heads 72 are fixedly arranged at the bottoms of the stretching rods 71.

After the demolding cup sleeve 4 and the pressing ring 3 respectively press the sheet, the drawing plate 7 is driven to be pressed downwards through the drawing driving device, the drawing head 72 is enabled to draw the sheet and form an air cavity between the sheet and the upper template 1, the sheet is enabled to be tightly attached to the inner wall of the forming cavity 41 of the demolding cup sleeve 4 to be processed and formed through pressurization towards the forming cavity 41, the drawing head 72 moves upwards to reset after the sheet is formed, and meanwhile, the lower template 2 is rapidly pressed with the upper template 1 to enable the upper shear 81 and the lower shear 91 to be matched to complete punching and shearing of the sheet.

Referring to fig. 3, 4 and 6, a screw sleeve 5 is fixedly arranged at the bottom of each demolding cup sleeve 4, a connecting gasket 42 is fixedly connected between each demolding cup sleeve 4 and each screw sleeve 5, each demolding cup sleeve 4 penetrates through a molding cavity 41 from the bottom surface and is provided with a through hole 43, each screw sleeve 5 penetrates through a threaded hole from top to bottom, a top cup plate 6 is telescopically arranged below the lower template 2, a telescopic driving device is fixedly arranged below each top cup plate 6, in the embodiment, an air cylinder is preferably adopted, the telescopic end of each cylinder is fixedly connected with each top cup plate 6, a plurality of screws 61 in threaded connection with the screw sleeves 5 are respectively arranged on the top cup plates 6, the tops of the screws 61 penetrate through the through holes 43 and extend to the bottom surfaces of the molding cavities 41, demolding cup bottoms 62 are fixedly arranged at the tops of the screws 61, the screw rods 61 support containers in the molding cavities 41 by driving the top cup plates 6 to ascend through the telescopic driving devices, and the screw sleeves 5 drive the demolding cup sleeves 4 to rotate under the linear motion effect of the screws 61, so that the containers are demolded and are pushed out of the molding cavities 41 under the effect of the demolding cup sleeves 4. Thereby preventing the container which is spirally and reversely buckled from being forcibly ejected out of the forming cavity 41, avoiding the deformation or damage of the product during demoulding and greatly improving the qualification rate of the product.

Referring to fig. 2, the bottom of the lower template 2 is fixedly provided with a plurality of guide rods 21, the top cup plate 6 is fixedly provided with a plurality of limit sleeves 63 in sliding fit with the guide rods 21, the top cup plate 6 is matched with the guide rods 21 through the limit sleeves 63 in the lifting process to guide, and the end surfaces of the limit sleeves 63 are abutted to the bottom surface of the lower template 2, so that the sliding stroke of the screw rod is limited.

Of course, the above embodiments are only for illustrating the technical concept and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and to implement the present invention, which cannot limit the protection scope of the present invention, and all modifications made according to the spirit of the main technical solution of the present invention should be covered within the protection scope of the present invention.

Claims

1. A thermal forming device with a rotary demolding structure comprises an upper template (1) and a lower template (2) arranged below the upper template (1) in a liftable mode, wherein a plurality of inner cavities are formed in the upper template (1) and the lower template (2), and the thermal forming device is characterized in that a material pressing ring (3) is inserted into the inner cavity of the upper template (1) in a sliding mode, demolding cup sleeves (4) are respectively and rotatably arranged in the inner cavities of the lower template (2), the demolding cup sleeves (4) are matched with the material pressing ring (3) to press sheets when the lower template (2) rises, a forming cavity (41) is formed in the top surface of each demolding cup sleeve (4), a screw rod sleeve (5) is fixedly arranged at the bottom of each demolding cup sleeve (4), and a through hole is formed in the demolding cup sleeves (4) in a manner of penetrating through the forming cavity (41) from the bottom surface;

the lower die plate (2) is provided with a cup ejection plate (6) in a telescopic manner, the cup ejection plate (6) is provided with a plurality of screw rods (61) in threaded connection with a screw rod sleeve (5) respectively, the top of each screw rod (61) penetrates through the through hole to extend to the bottom surface of the forming cavity (41), the top of each screw rod (61) is fixedly provided with a demolding cup bottom (62) for supporting the bottom surface of an inner container of the forming cavity (41), the cup ejection plate (6) is driven when rising to support a container by the screw rods (61), and meanwhile the screw rod sleeve (5) drives the demolding cup sleeve (4) to rotate under the action of linear motion of the screw rods (61) to enable the container to be separated from the demolding cup sleeve (4).

2. A thermoforming apparatus as claimed in claim 1, characterised in that a connecting washer (42) is fixedly connected between the demolding cup sleeve (4) and the screw sleeve (5).

3. A thermoforming apparatus with rotary demolding structure, as claimed in claim 2, characterized in that a stretching plate (7) is telescopically arranged above the upper mold plate (1), a plurality of stretching rods (71) are fixedly arranged on the bottom surface of the stretching plate (7), the stretching rods (71) are respectively slidably inserted on the upper mold plate (1), and a stretching head (72) is fixedly arranged at the bottom of the stretching rods (71) for stretching the sheet material into the molding cavity (41).

4. The thermoforming device with the rotary demolding structure, according to claim 3, characterized in that an upper shear plate (8) is fixedly arranged on a bottom surface of the upper template (1), a lower shear plate (9) is fixedly arranged on a top surface of the lower template (2), a plurality of upper through grooves communicated with an inner cavity of the upper template (1) are respectively arranged on the upper shear plate (8), and a plurality of lower through grooves communicated with an inner cavity of the lower template (2) are respectively arranged on the lower shear plate (9).

5. The thermoforming device with the rotary demolding structure, according to claim 4, characterized in that an upper shear (81) is disposed in the upper through groove, a lower shear (91) is disposed in the lower through groove, a limiting ring groove is disposed on one end of the upper mold plate (1)/the lower mold plate (2) of the inner wall of the upper through groove/the lower through groove, and limiting flanges in limiting fit with the limiting ring groove are disposed on the upper shear (81) and the lower shear (91), respectively.

6. A thermoforming apparatus as claimed in claim 5, characterised in that the upper outer wall of the lower shear (91) is tapered to allow the lower edge of the upper shear (81) to engage with the upper edge of the lower shear (91) to cut sheet material.

7. The thermoforming device with the rotary demolding structure as claimed in claim 1, wherein a plurality of guide rods (21) are fixedly arranged at the bottom of the lower mold plate (2), and a plurality of limiting sleeves (63) in sliding fit with the guide rods (21) are fixedly arranged on the cup ejecting plate (6).

8. The thermoforming device with the rotary demolding structure as claimed in claim 1, wherein the lower opening of the inner cavity of the upper template (1) is provided with a limiting convex edge, and the upper part of the material pressing ring (3) is provided with a stop convex edge matched with the limiting convex edge.