Plastic suction mold with buffer structure

Abstract

The utility model relates to a plastic uptake mould with a buffer structure, which comprises a lower mould, through holes are arranged on the bottom wall and the side wall of the lower mould, an air suction cover is sleeved outside the lower mould, a sealing plate is integrally formed on the peripheral side of the top end of the lower mould, and the bottom wall and the side wall of the lower mould are both provided with through holes. The top end of the lower die is fixed to the inner wall of the air suction hood through the sealing plate, and an air suction connecting structure is installed at one end of the air suction hood. Due to the fact that the two sides of the lower die are slidably connected with the guide rods through the connecting plates, in the downward pressing process of the upper pressing die, the lower die can be pushed to synchronously slide downwards to extrude the springs to contract, the peripheral side of a plastic sheet is pressed and sealed through elastic force supporting of the springs and the upper pressing die, and due to the fact that the lower die can slide downwards after being pressed, the lower die obtains movement allowance. Therefore, in the whole descending process of the upper pressing die, hard collision between the upper pressing die and the lower die is changed into flexible accompanying on a section of displacement, and the probability that the lower die deforms due to collision and extrusion is effectively reduced.

Description

TECHNICAL FIELD

[0001] The utility model belongs to blister mold technical field, concretely relates to a blister mold with buffer structure. BACKGROUND

[0002] Blister mold is a kind of mold used with blister machine, needs to be loaded into the upper layer iron plate of vacuum chamber when producing, then according to the size of mold, the plastic sheet is formed into applicable specification size, then the plastic sheet is placed on constant-temperature furnace and is softened, the plastic sheet that is softened is placed on the mold in vacuum chamber, and the air suction switch is started, the air between the mold and plastic sheet is sucked clean through the suction hole densely arranged on the mold, and the softened plastic sheet is fully attached to the surface of the mold under the action of air pressure, and after the plastic sheet is cooled, the product same with the mold is obtained.

[0003] Blister mold needs to be sealed and pressed with the peripheral side of the plastic sheet material heated and softened and the peripheral side of the top end of the lower mold by the upper pressing mold driven by the air cylinder before blistering, and the existing blister mold generally does not have a buffer structure, and the upper pressing mold may collide and extrude with the top end of the lower mold during the sealing and pressing process, which may easily cause the deformation of the lower mold and affect the quality of the blister product. UTILITY MODEL CONTENTS

[0004] The utility model aims at providing a kind of blister mold with buffer structure with simple structure and reasonable design to solve the above problems.

[0005] The utility model realizes the above-mentioned purposes by the following technical solutions:

[0006] A kind of blister mold with buffer structure, including the lower mold that the bottom wall and side wall are all provided with through-hole, the lower mold is equipped with suction cover, the lower mold top peripheral side is integrally formed with sealing plate, the lower mold top is fixed with the inner wall of the suction cover by the sealing plate, one end of the suction cover is equipped with suction connection structure, the suction cover peripheral side is provided with support, two groups of guide rods are symmetrically installed on the support bottom wall, two groups of connecting plates are correspondingly connected on the suction cover outer wall, the connecting plate is sleeved on the guide rod and is slidably connected with the guide rod, spring is sleeved on the guide rod below the connecting plate, the bottom end of the spring is fixed with the support bottom wall, the top end of the spring is fixed with the connecting plate, the upper pressing mold is arranged above the lower mold, the upper surface of the upper pressing mold is connected with the guide structure that can slide along the height direction of the guide rod, the cylinder is fixedly connected on the support top wall, the piston rod is installed on the output end of the cylinder, the bottom end of the piston rod penetrates the support top wall and is slidably connected with the support top wall, and one end of the piston rod in the support is fixed with the guide structure.

[0007] As a further optimization scheme of the utility model, the air extraction connecting structure includes a pipe joint penetrating through the air suction cover side wall and being rotationally connected with the air suction cover side wall, a hand knob is fixedly sleeved at the connection position of the pipe joint and the air suction cover, and an external thread is formed on one end of the pipe joint outside the air suction cover.

[0008] As a further optimization scheme of the utility model, the support is in a rectangular frame structure, and an ear plate is fixedly connected to each side of the support bottom wall, and a through hole is formed in the ear plate for the external bolt to pass through.

[0009] As a further optimization scheme of the utility model, a gap is arranged between the air suction cover bottom wall and the support bottom wall for the air suction cover to slide downward, and the height of the gap is less than the maximum compression length of the spring.

[0010] As a further optimization scheme of the utility model, a heat preservation cavity is formed in the upper pressing die, the heat preservation cavity is filled with a heat preservation material, and an air inlet hole is formed in the center of the upper pressing die.

[0011] As a further optimization scheme of the utility model, the guide structure includes guide plates slidably connected with the guide rods on both sides, four connection columns are fixedly installed on the lower surface of the guide plate in a matrix distribution, and the bottom end of the connection column is fixedly connected with the upper pressing die.

[0012] The utility model has the advantages that the lower die is slidably connected with the guide rod through the connecting plate on both sides, the lower die can be pushed to slide downward and extrude the spring to shrink during the downward pressing of the upper pressing die, the spring is supported by the elastic force to cooperate with the upper pressing die to press and seal the peripheral side of the plastic sheet, the lower die can slide downward after being pressed, so that the lower die has a certain amount of movement, the hard collision between the upper pressing die and the lower die is changed into flexible following during a certain displacement, and the probability of the deformation of the lower die due to the collision and extrusion is effectively reduced. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 is the overall structure schematic view of the utility model;

[0014] Figure 2 is the overall cross section structure schematic view of the utility model;

[0015] Figure 3 is the connection structure schematic view of the air suction cover and the guide rod of the utility model Figure 2

[0016] Figure 4 is the connection structure schematic view of the air suction cover and the guide rod of the utility model

[0017] ​In the figure: 1. Lower die; 2. Through hole; 3. Suction hood; 4. Sealing plate; 5. Pipe joint; 6. Twist handle; 7. Bracket; 8. Ear plate; 9. Guide rod; 10. Connecting plate; 11. Spring; 12. Upper die; 13. Insulation chamber; 14. Guide plate; 15. Connecting column; 16. Cylinder; 17. Piston rod. DETAILED DESCRIPTION

[0018] The present application is described in further detail below in conjunction with the accompanying drawings. It is necessary to point out that the following specific implementation methods are only used to further illustrate the present application and cannot be understood as limiting the scope of protection of the present application. Technicians in this field can make some non-essential improvements and adjustments to the present application based on the above application content.

[0019] Example

[0020] like Figure 1 - Figure 4 As shown, a blister mold with a buffer structure comprises a lower mold 1 with through holes 2 on both the bottom wall and the side wall, an outer sleeve of the lower mold 1 is provided with an air suction hood 3, the inner cavity of the lower mold 1 is communicated with the inner cavity of the air suction hood 3 through the through hole 2, a sealing plate 4 is integrally formed on the peripheral side of the top end of the lower mold 1, the top end of the lower mold 1 is fixed to the inner wall of the air suction hood 3 through the sealing plate 4, one end of the air suction hood 3 is installed with an exhaust connection structure, the exhaust connection structure comprises a pipe joint 5 at one end which passes through the side wall of the air suction hood 3 and is rotatably connected to the side wall of the air suction hood 3, a screw handle 6 is fixedly provided at the connection between the pipe joint 5 and the air suction hood 3, an external thread is provided on one end of the pipe joint 5 located on the outside of the air suction hood 3, and the screw handle 6 is provided to facilitate the user to rotate the pipe joint 5 by the screw handle 6, so as to facilitate the threaded connection of the exhaust pipe of the external vacuum pump through the external thread provided on the pipe joint 5;

[0021] A bracket 7 is provided around the air hood 3. The bracket 7 is a rectangular frame structure. Ear plates 8 are fixedly connected to both sides of the bottom wall of the bracket 7. The ear plates 8 are provided with through holes for external bolts to pass through. Users can pass the bolts through the through holes through the ear plates 8 and then screw them to the external frame, making it convenient to fix the bracket 7.

[0022] Two groups of guide rods 9 are symmetrically installed on the bottom wall of the bracket 7, and two groups of connecting plates 10 are correspondingly connected to the outer wall of the air hood 3. The connecting plates 10 are sleeved on the guide rods 9 and slidably connected to the guide rods 9. A spring 11 is sleeved on the guide rods 9 below the connecting plates 10. The bottom end of the spring 11 is fixed to the bottom wall of the bracket 7, and the top end of the spring 11 is fixed to the connecting plate 10. A gap is left between the bottom wall of the air hood 3 and the bottom wall of the bracket 7 for the air hood 3 to slide downward, so that the air hood 3 can slide along the height direction of the guide rods 9. The height of the gap is less than the maximum compression length of the spring 11, which can minimize the damage of the spring 11 due to excessive compression;

[0023] An upper compression mold 12 is arranged above the lower mold 1, the upper compression mold 12 is internally provided with a heat preservation cavity 13, the heat preservation cavity 13 is filled with heat preservation material, and the upper compression mold 12 is centrally provided with an air inlet hole for passing air. The heat preservation cavity 13 is arranged and filled with heat preservation material in the heat preservation cavity 13, so as to preserve the plastic sheet after being heated and softened, and avoid the problem that the plastic sheet is cooled too quickly and affects the product forming quality.

[0024] The upper surface of the upper compression mold 12 is connected with a guide structure which can slide in the height direction of the guide rod 9, the guide structure comprises guide plates 14 which are slidably connected with the guide rod 9 on both sides, four connection columns 15 which are fixedly installed on the lower surface of the guide plate 14 in a matrix distribution, and the bottom end of the connection column 15 is fixedly connected with the upper compression mold 12. The guide plate 14 is arranged to guide the upper compression mold 12 in cooperation with the guide rod 9, so as to avoid the deviation of the upper compression mold 12 during the downward sliding process.

[0025] The top wall of the support 7 is fixedly connected with an air cylinder 16, the output end of the air cylinder 16 is installed with a piston rod 17, the bottom end of the piston rod 17 penetrates through the top wall of the support 7 and is slidably connected with the top wall of the support 7, and the end of the piston rod 17 located in the support 7 is fixedly connected with the guide structure. When the air cylinder 16 is started, the upper compression mold 12 installed below the guide plate 14 can be pushed downward by the piston rod 17 to extend, so as to seal and press the plastic sheet after being heated and softened on the sealing plate 4.

[0026] It should be noted that the blister mold with the buffering structure is used, the plastic sheet after being heated and softened is first overlapped on the sealing plate 4 with the ring structure, then the air cylinder 16 drives the piston rod 17 to extend, so as to push the upper compression mold 12 installed below the guide plate 14 to move downward, and the plastic sheet after being heated and softened is sealed and pressed on the sealing plate 4. Then the air suction pipeline of the external vacuum pump is connected with the pipeline joint 5, the air suction pump can be started to suck out the air in the air suction cover 3, so that the plastic sheet after being heated is attached to the inner wall of the lower mold 1 under the action of negative pressure. After the plastic sheet is cooled, the product can be formed by blistering. Since the lower mold 1 is slidably connected with the guide rod 9 through the connecting plate 10, when the upper compression mold 12 is pressed downward, the lower mold 1 can be pushed to slide downward synchronously to compress the spring 11 to shrink. The plastic sheet around is sealed and pressed by the elastic force of the spring 11 in cooperation with the upper compression mold 12. Since the lower mold 1 can slide downward after being pressed, the lower mold 1 obtains the activity allowance, so that the hard collision between the upper compression mold 12 and the lower mold 1 is changed to the flexible following in a displacement during the whole descending process of the upper compression mold 12, and the probability of the deformation of the lower mold 1 due to the collision and compression is effectively reduced.

[0027] The above-described embodiments only express several implementation manners of the utility model, the description is more specific and detailed, but can not therefore be understood as the limitation of the utility model patent range. It should be pointed out that for ordinary skilled person in the art, without departing from the utility model concept, several deformations and improvements can be made, which belong to the protection range of the utility model.

Claims

1. A blister mold with a buffer structure, comprising a lower mold (1) with through holes (2) formed on both the bottom wall and the side wall, an air suction hood (3) being provided on the outer cover of the lower mold (1), a sealing plate (4) being integrally formed on the circumference of the top end of the lower mold (1), the top end of the lower mold (1) being fixed to the inner wall of the air suction hood (3) through the sealing plate (4), and an exhaust connection structure being installed at one end of the air suction hood (3), characterized in that: A bracket (7) is provided on the peripheral side of the suction hood (3), two groups of guide rods (9) are symmetrically installed on the bottom wall of the bracket (7), and two groups of connecting plates (10) are correspondingly connected to the outer wall of the suction hood (3), the connecting plates (10) are sleeved on the guide rods (9) and slidably connected to the guide rods (9), and a spring (11) is sleeved on the guide rods (9) below the connecting plates (10), the bottom end of the spring (11) is fixed to the bottom wall of the bracket (7), and the top end of the spring (11) is fixed to the connecting plates. (10) is fixed, an upper die (12) is provided above the lower die (1), the upper surface of the upper die (12) is connected with a guide structure that can slide along the height direction of the guide rod (9), a cylinder (16) is fixedly connected to the top wall of the bracket (7), a piston rod (17) is installed at the output end of the cylinder (16), the bottom end of the piston rod (17) passes through the top wall of the bracket (7) and is slidably connected to the top wall of the bracket (7), and one end of the piston rod (17) located in the bracket (7) is fixed to the guide structure.

2. The blister mold with a buffer structure according to claim 1, characterized in that: The exhaust connection structure comprises a pipe joint (5) having one end penetrating the side wall of the suction hood (3) and being rotatably connected to the side wall of the suction hood (3); a screw handle (6) is fixedly provided at the connection between the pipe joint (5) and the suction hood (3); and an external thread is provided on one end of the pipe joint (5) located outside the suction hood (3).

3. The blister mold with a buffer structure according to claim 1, characterized in that: The bracket (7) is a rectangular frame structure, and both sides of the bottom wall of the bracket (7) are fixedly connected with ear plates (8), and the ear plates (8) are provided with through holes for external bolts to pass through.

4. The blister mold with a buffer structure according to claim 1, characterized in that: A gap is left between the bottom wall of the air suction hood (3) and the bottom wall of the bracket (7) for the air suction hood (3) to slide downward, and the height of the gap is less than the maximum compression length of the spring (11).

5. The blister mold with a buffer structure according to claim 1, characterized in that: A heat preservation cavity (13) is provided inside the upper pressing die (12), and the heat preservation cavity (13) is filled with heat preservation material. An air inlet hole for passing air is provided at the center of the upper pressing die (12).

6. The blister mold with a buffer structure according to claim 1, characterized in that: The guide structure comprises a guide plate (14) slidably connected to the guide rod (9) on both sides, four matrix-distributed connecting columns (15) are fixedly mounted on the lower surface of the guide plate (14), and the bottom ends of the connecting columns (15) are fixedly connected to the upper die (12).

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