Positive and negative pressure plastic uptake forming mold and forming process thereof

Abstract

The invention discloses a positive and negative pressure plastic uptake forming mold and a forming process thereof. The positive and negative pressure plastic uptake forming mold comprises an upper mold, a lower mold, a vacuum adsorption device and an air blowing device, the air blowing device is arranged in the upper die, the upper die is provided with an air outlet channel and a female die, the female die is provided with an air outlet hole communicated with the air outlet channel, and the air blowing device is connected with the air outlet channel; the vacuum adsorption device is arranged in the lower die, the lower die is provided with an air exhaust channel, a male die and an adsorption hole, the adsorption hole is communicated with the air exhaust channel, the vacuum adsorption device is connected with the air exhaust channel, the upper die and the lower die are assembled, and the female die and the male die are connected in a matched mode; thus, the sheet is adsorbed to the outer wall of the male die through the vacuum adsorption device, the air blowing device is matched to blow air towards the sheet through the air outlet holes so that the sheet can be attached to the male die, plastic uptake forming of a plastic uptake product is completed through cooperation of the female die, and the adsorption and attachment stability between the sheet and the male die is improved; therefore, the stable and consistent quality of the plastic uptake formed workpiece is ensured, and the application range is wide.

Description

Technical Field

[0001] The present invention relates to the field of mold technology, in particular to a positive and negative pressure plastic suction molding mold and a molding process thereof. Background Art

[0002] At present, molds are used in industrial production to obtain various molds and tools for the desired products by methods such as injection molding, blow molding, extrusion, die-casting or forging, smelting, and stamping. In short, a mold is a tool used to make molded objects. This tool is composed of various parts, and different molds are composed of different parts. It mainly realizes the processing of the shape of the object by changing the physical state of the molded material. Blister molds refer to the molds used in blister production. The main principle is to heat and soften the flat plastic hard sheet, vacuum adsorb it on the mold surface, and cool it to form. The blister box manufactured under the blister process has the advantages of light weight, easy use, and good protection. Therefore, blister boxes are widely used in electronics, food, toys, color box windows, collar trays, shoe packaging and other fields.

[0003] Existing blister forming molds generally adsorb one side of a sheet onto a male or female mold through adsorption holes to achieve blister forming of blister products; however, the structural design of existing blister forming molds is poor, and the sheet is gradually adsorbed and adhered to the mold according to the position of the adsorption holes, and the sheet located far away from the adsorption holes is prone to unstable adsorption effect, resulting in inconsistent quality of blister formed workpieces, resulting in rework or scrapping problems, which cannot meet user needs and has a small scope of application.

[0004] Therefore, it is necessary to study a new technical solution to solve the above problems. Summary of the Invention

[0005] In view of this, the present invention aims to address the deficiencies in the prior art, and its main purpose is to provide a positive and negative pressure blister forming mold and its forming process, which utilizes a vacuum adsorption device to adsorb the sheet material to the outer wall of the punch, cooperates with an air blowing device to blow air toward the sheet material through the air outlet to make the sheet material adhere to the punch, and cooperates with the die to complete the blister forming of the blister product, thereby improving the adsorption and bonding stability between the sheet material and the punch, thereby ensuring the stable and consistent quality of the blister formed workpiece and a wide range of applications.

[0006] To achieve the above object, the present invention adopts the following technical solutions:

[0007] A positive and negative pressure plastic forming mold, comprising an upper mold, a lower mold, a vacuum adsorption device and an air blowing device; wherein:

[0008] The blowing device is arranged in the upper mold, an air outlet channel is arranged inside the upper mold, a concave mold is arranged at the lower end of the upper mold, an air outlet hole connected to the air outlet channel is arranged on the concave mold, and the blowing device is connected to the air outlet channel;

[0009] The vacuum adsorption device is arranged in the lower mold, and an exhaust channel is provided inside the lower mold. A punch and an adsorption hole are provided at the upper end of the lower mold. The adsorption hole is located on one side of the punch, and the adsorption hole is connected to the exhaust channel. The vacuum adsorption device is connected to the exhaust channel, the upper mold and the lower mold are clamped, and the concave mold and the punch are adaptively connected.

[0010] As a preferred solution, there are a plurality of air outlet holes, which are arranged in an array on the die.

[0011] As a preferred solution, the upper mold is connected to a first cooling component, which includes a first infusion device and a first liquid storage tank. The upper mold has a first circulating heat dissipation channel with a first water inlet and a first water outlet. The first circulating heat dissipation channel is located on one side of the air outlet channel. The first water inlet is connected to the first infusion device, and the first water outlet is connected to the first liquid storage tank. The first infusion device and the first liquid storage tank are connected by a first pipe.

[0012] As a preferred solution, the lower mold is connected to a second cooling assembly, the second cooling assembly includes a second infusion device and a second liquid storage tank, the lower mold has a second circulating heat dissipation channel with a second water inlet and a second water outlet, the second circulating heat dissipation channel is located on one side of the exhaust channel, the second water inlet is connected to the second infusion device, the second water outlet is connected to the second liquid storage tank, and the second infusion device and the second liquid storage tank are connected by a second pipe.

[0013] As a preferred solution, the punch is detachably arranged at the upper end of the lower die.

[0014] As a preferred solution, a mounting groove is provided at the upper end of the lower mold, a mounting plate is provided at the lower end of the punch, through holes are provided on the mounting plate corresponding to the adsorption holes, the mounting plate is provided on the mounting groove, and the through holes are provided corresponding to the adsorption holes.

[0015] A positive and negative pressure plastic forming mold forming process includes the following steps:

[0016] Step 1: prepare the sheet and heat the sheet;

[0017] Step 2: Place the heated sheet on the upper end of the lower mold;

[0018] Step 3: Clamp the upper mold to the lower mold;

[0019] Step 4: Start the vacuum adsorption device and the blowing device. The vacuum adsorption device generates negative pressure in the air extraction channel, and uses the adsorption holes to adsorb the sheet to the outer wall of the male mold. At the same time, the blowing device generates positive pressure in the air outlet channel, and uses the air outlet holes to blow air toward the sheet so that the sheet adheres to the male mold, and the blister molding of the blister product is completed through the cooperation of the female mold.

[0020] Step 5: Separate the upper mold from the lower mold and take out the workpiece after vacuum forming.

[0021] As a preferred solution, in step four, when the sheet is adsorbed on the male mold, the first infusion device of the upper mold and the second infusion device of the lower mold simultaneously input the coolant into the first circulation heat dissipation channel and the second circulation heat dissipation channel respectively to absorb and discharge the heat of the sheet, so as to accelerate the cooling and shaping of the blister product and prevent the blister product from deformation.

[0022] Compared with the prior art, the present invention has obvious advantages and beneficial effects. Specifically, it can be seen from the above technical solution that it mainly adopts the design of various components, utilizes a vacuum adsorption device to adsorb the sheet material to the outer wall of the male mold, cooperates with the blowing device to blow air toward the sheet material through the air outlet to make the sheet material adhere to the male mold, and cooperates with the female mold to complete the blister forming of the blister product, thereby improving the adsorption and bonding stability between the sheet material and the male mold, thereby ensuring the stable and consistent quality of the blister formed workpiece, reducing the phenomenon of rework or scrapping of products, and having an ingenious and reasonable structural design, good stability, meeting the use needs of users, and having a wide range of applications.

[0023] Secondly, the setting of the first cooling component is conducive to accelerating the cooling and shaping of the blister products, ensuring the molding quality of the blister products. In conjunction with the setting of the second cooling component, it further accelerates the cooling and shaping of the blister products, thereby preventing the blister products from deforming. The product molding quality is stable and consistent, and the usability is good.

[0024] In addition, the setting of the connecting protrusion and the connecting groove is conducive to the stability of the mold closing operation between the upper mold and the lower mold, ensuring the use of the forming mold. Combined with the setting of the seal, it is conducive to ensuring the mold closing sealing between the punch and the die when the upper mold and the lower mold are closed, thereby ensuring the adsorption and blowing bonding effects of the sheet material, thereby improving the molding quality of the blister product and having strong practicality.

[0025] In order to more clearly illustrate the structural features and effects of the present invention, the present invention is described in detail below with reference to the accompanying drawings and specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a three-dimensional schematic diagram of an embodiment of the present invention;

[0027] Figure 2 is a cross-sectional view of an embodiment of the present invention;

[0028] Figure 3 yes Figure 2 A locally enlarged schematic diagram of position A is shown.

[0029] Description of the accompanying drawings:

[0030] 11. Upper mold 111. Exhaust channel

[0031] 112, die 113, vent hole

[0032] 114. First water inlet 115. First water outlet

[0033] 116. First circulation heat dissipation channel 117. Connection groove

[0034] 12. Lower mold 121, exhaust channel

[0035] 122, punch 123, adsorption hole

[0036] 124, second water inlet 125, second water outlet

[0037] 126. Second circulation heat dissipation channel 127. Mounting plate

[0038] 128, mounting groove 129, through hole

[0039] 13. Vacuum adsorption device 14. Air blowing device

[0040] 15. Connect the protrusions. DETAILED DESCRIPTION

[0041] Please refer to Figures 1 to 3 As shown, it shows the specific structure of an embodiment of the present invention.

[0042] A positive and negative pressure plastic forming mold, comprising an upper mold 11, a lower mold 12, a vacuum adsorption device 13 and a blowing device 14; wherein:

[0043] The blowing device 14 is arranged in the upper mold 11. The upper mold 11 is provided with an air outlet channel 111 inside. The lower end of the upper mold 11 is provided with a die 112. The die 112 is provided with an air outlet hole 113 connected to the air outlet channel. The blowing device 14 is connected to the air outlet channel 111.

[0044] The vacuum adsorption device 13 is arranged in the lower mold 12. The interior of the lower mold 12 is provided with an air extraction channel 121. The upper end of the lower mold 121 is provided with a punch 122 and an adsorption hole 123. The adsorption hole 123 is located on one side of the punch 122. The adsorption hole 123 is connected to the air extraction channel 121. The vacuum adsorption device 13 is connected to the air extraction channel 121. The upper mold 11 and the lower mold 12 are clamped, and the concave mold 112 is adapted to be connected to the punch 122.

[0045] Specifically, a plurality of air outlet holes 113 are provided, and the plurality of air outlet holes 113 are arranged in an array on the die 112; a plurality of adsorption holes 123 are provided, and the plurality of adsorption holes 123 are arranged in a spaced manner around the edge of the punch 122. In this way, through the design of each component, a vacuum adsorption device is used to adsorb the sheet material to the outer wall of the punch, and the blowing device is used to blow air toward the sheet material using the air outlet holes to make the sheet material adhere to the punch, and the die is used in conjunction to complete the blister forming of the blister product, thereby improving the adsorption and fitting stability between the sheet material and the punch, thereby ensuring the stable and consistent quality of the blister formed workpiece, reducing the phenomenon of rework or scrapping of products, and having an ingenious and reasonable structural design, good stability, meeting the user's usage needs, and having a wide range of applications.

[0046] In addition, the upper mold 11 is connected to a first cooling assembly (not shown in the figure), which includes a first infusion device and a first liquid storage tank. The upper mold 11 has a first circulation heat dissipation channel 116 with a first water inlet 114 and a first water outlet 115. The first circulation heat dissipation channel 116 is located on one side of the air outlet channel 111. The first water inlet 114 is connected to the first infusion device, and the first water outlet 115 is connected to the first liquid storage tank. The first infusion device and the first liquid storage tank are connected via a first pipe.

[0047] The lower mold 12 is connected to a second cooling assembly (not shown in the figure), which includes a second infusion device and a second liquid storage tank. The lower mold 12 has a second circulation heat dissipation channel 126 with a second water inlet 124 and a second water outlet 125. The second circulation heat dissipation channel 126 is located on one side of the exhaust channel 121. The second water inlet 124 is connected to the second infusion device, and the second water outlet 125 is connected to the second liquid storage tank. The second infusion device and the second liquid storage tank are connected by a second pipe. In this way, the setting of the first cooling assembly is conducive to accelerating the cooling and shaping of the blister product and ensuring the molding quality of the blister product. In conjunction with the setting of the second cooling assembly, the cooling and shaping of the blister product is further accelerated, thereby preventing the blister product from being deformed. The product molding quality is stable and consistent, and the usability is good.

[0048] Furthermore, the lower mold 12 is provided with a connecting protrusion 15, and the connecting protrusion 15 is located at the upper end edge of the lower mold 12. The lower end of the upper mold 11 is provided with a connecting groove 117 that matches the connecting protrusion. The connecting groove 117 is matched with the connecting protrusion 15 to achieve the mold connection between the upper mold 11 and the lower mold 12. Specifically, the connecting protrusion 15 is annular in structure, and the connecting protrusion 15 is annularly extended along the edge of the lower mold 12. Correspondingly, the connecting groove 117 is annular in structure, and the connecting groove 117 is along the upper mold The lower end edge of 11 is provided with an annular extension. Preferably, a seal (not shown in the figure) is provided between the connecting protrusion 15 and the connecting groove 117. In this way, the setting of the connecting protrusion and the connecting groove is beneficial to the stability of the mold closing operation between the upper mold and the lower mold, ensuring the use of the forming mold. The setting of the seal is beneficial to ensure the mold closing sealing between the male mold and the female mold when the upper mold and the lower mold are closed, thereby ensuring the adsorption and bonding effect and the blowing and bonding effect of the sheet material, thereby improving the molding quality of the blister product and having strong practicality.

[0049] In addition, the punch 122 is detachably arranged at the upper end of the lower mold 12, and a mounting groove 128 is provided at the upper end of the lower mold 12. A mounting plate 127 is provided at the lower end of the punch 122, and a through hole 129 is provided on the mounting plate 127 corresponding to the adsorption hole. The mounting plate 127 is arranged on the mounting groove 128, and the through hole 129 is arranged corresponding to the adsorption hole 123. In this way, by replacing different punches, different blister products can be formed to meet the user's usage needs.

[0050] A positive and negative pressure plastic forming mold forming process includes the following steps:

[0051] Step 1: prepare the sheet and heat the sheet;

[0052] Step 2: Place the heated sheet on the upper end of the lower mold;

[0053] Step 3: Clamp the upper mold to the lower mold;

[0054] Step 4: Start the vacuum adsorption device and the blowing device. The vacuum adsorption device generates negative pressure in the air extraction channel, and uses the adsorption holes to adsorb the sheet to the outer wall of the male mold. At the same time, the blowing device generates positive pressure in the air outlet channel, and uses the air outlet holes to blow air toward the sheet so that the sheet adheres to the male mold, and the blister molding of the blister product is completed through the cooperation of the female mold.

[0055] Step 5: Separate the upper mold from the lower mold and take out the workpiece after vacuum forming.

[0056] And, in step four, when the sheet is adsorbed on the male mold, the first infusion device of the upper mold and the second infusion device of the lower mold simultaneously input the coolant into the first circulation heat dissipation channel and the second circulation heat dissipation channel respectively to absorb and discharge the heat of the sheet, so as to accelerate the cooling and shaping of the blister product and prevent the blister product from deformation.

[0057] The key point of the design of the present invention is that, mainly through the design of various components, a vacuum adsorption device is used to adsorb the sheet material to the outer wall of the male mold, and an air blowing device is used to blow air toward the sheet material through the air outlet to make the sheet material adhere to the male mold, and the female mold is used to cooperate to complete the blister forming of the blister product, thereby improving the adsorption and adhesion stability between the sheet material and the male mold, thereby ensuring the stable and consistent quality of the blister formed workpiece, reducing the phenomenon of rework or scrapping of products, and having an ingenious and reasonable structural design, good stability, meeting the use needs of users, and having a wide range of applications;

[0058] Secondly, the setting of the first cooling component is conducive to accelerating the cooling and shaping of the blister products, ensuring the molding quality of the blister products. In conjunction with the setting of the second cooling component, it further accelerates the cooling and shaping of the blister products, thereby preventing the blister products from deforming. The product molding quality is stable and consistent, and the usability is good.

[0059] In addition, the setting of the connecting protrusion and the connecting groove is conducive to the stability of the mold closing operation between the upper mold and the lower mold, ensuring the use of the forming mold. Combined with the setting of the seal, it is conducive to ensuring the mold closing sealing between the punch and the die when the upper mold and the lower mold are closed, thereby ensuring the adsorption and blowing bonding effects of the sheet material, thereby improving the molding quality of the blister product and having strong practicality.

[0060] The above description is merely a preferred embodiment of the present invention and does not limit the technical scope of the present invention. Therefore, any minor modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A positive and negative pressure plastic forming mold, characterized by: It includes an upper mold, a lower mold, a vacuum adsorption device and an air blowing device; wherein: The blowing device is arranged in the upper mold, an air outlet channel is arranged inside the upper mold, a concave mold is arranged at the lower end of the upper mold, an air outlet hole connected to the air outlet channel is arranged on the concave mold, and the blowing device is connected to the air outlet channel; The vacuum adsorption device is arranged in the lower mold, the interior of the lower mold is provided with an exhaust channel, the upper end of the lower mold is provided with a convex mold and an adsorption hole, the adsorption hole is located on one side of the convex mold, the adsorption hole is connected to the exhaust channel, the vacuum adsorption device is connected to the exhaust channel, the upper mold and the lower mold are clamped, and the concave mold and the convex mold are adaptively connected; The lower mold is provided with a connecting protrusion, which is located at the upper end edge of the lower mold. The lower end of the upper mold is provided with a connecting groove that matches the connecting protrusion. The connecting groove is matched with the connecting protrusion to achieve a mold connection between the upper mold and the lower mold.

2. The positive and negative pressure blister molding mold according to claim 1, characterized in that: There are a plurality of air outlet holes, which are arranged in an array on the die.

3. The positive and negative pressure blister molding mold according to claim 1, characterized in that: The upper mold is connected to a first cooling assembly, which includes a first infusion device and a first liquid storage tank. The upper mold has a first circulating heat dissipation channel with a first water inlet and a first water outlet. The first circulating heat dissipation channel is located on one side of the air outlet channel. The first water inlet is connected to the first infusion device, and the first water outlet is connected to the first liquid storage tank. The first infusion device and the first liquid storage tank are connected by a first pipe.

4. The positive and negative pressure blister molding mold according to claim 1, characterized in that: The lower mold is connected to a second cooling assembly, which includes a second infusion device and a second liquid storage tank. The lower mold has a second circulating heat dissipation channel with a second water inlet and a second water outlet. The second circulating heat dissipation channel is located on one side of the air extraction channel. The second water inlet is connected to the second infusion device, and the second water outlet is connected to the second liquid storage tank. The second infusion device and the second liquid storage tank are connected by a second pipe.

5. The positive and negative pressure plastic forming mold according to claim 1, characterized in that: The convex mold is detachably arranged on the upper end of the lower mold.

6. The positive and negative pressure plastic forming mold according to claim 5, characterized in that: The upper end of the lower mold is provided with a mounting groove, the lower end of the male mold is provided with a mounting plate, the mounting plate is provided with through holes corresponding to the adsorption holes, the mounting plate is provided on the mounting groove, and the through holes are provided corresponding to the adsorption holes.

7. A positive and negative pressure plastic forming mold forming process, characterized in that: The following steps are included: Step 1: prepare the sheet and heat the sheet; Step 2: Place the heated sheet on the upper end of the lower mold; Step 3: Clamp the upper mold to the lower mold; Step 4: Start the vacuum adsorption device and the blowing device. The vacuum adsorption device generates negative pressure in the air extraction channel, and uses the adsorption holes to adsorb the sheet to the outer wall of the male mold. At the same time, the blowing device generates positive pressure in the air outlet channel, and uses the air outlet holes to blow air toward the sheet so that the sheet adheres to the male mold, and the blister molding of the blister product is completed through the cooperation of the female mold. Step 5: Separate the upper mold from the lower mold and take out the workpiece after vacuum forming.

8. The positive and negative pressure plastic forming mold forming process according to claim 7, characterized in that: In step four, when the sheet is adsorbed on the male mold, the first infusion device of the upper mold and the second infusion device of the lower mold simultaneously input the coolant into the first circulation heat dissipation channel and the second circulation heat dissipation channel respectively to absorb and discharge the heat of the sheet, so as to accelerate the cooling and shaping of the blister product and prevent the blister product from deformation.

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