CN111155359A - Fiber pulp wet blank nondestructive dehydration shaping method and wet blank nondestructive dehydration shaping module - Google Patents

Abstract

The application provides a fiber pulp wet blank lossless dehydration shaping method and a wet blank lossless dehydration shaping module. The fiber pulp wet blank nondestructive dehydration shaping method is characterized in that a shaping die is designed into two split sliding dies which are split left and right and can slide horizontally to open and close, the two split sliding dies are driven to synchronously and longitudinally move close to the surface of an adsorption die of an absorption die, and pressure is applied to the surface of the adsorption die of the absorption die until the split sliding dies and the surface of the adsorption die of the absorption die are shaped and matched, so that the dehydration shaping of a fiber pulp layer wet blank is completed. The wet blank lossless dehydration shaping module for realizing the fiber pulp wet blank lossless dehydration shaping method can be a male die shaping module and can also be a female die shaping module. The technical scheme can meet the strict technical requirements of high-grade commodities on multiple indexes such as high surface smoothness, thickness, strength and density of a packaged object, and also has the technical advantages of high dehydration and shaping efficiency, high yield, small pressure of subsequent procedures and low cost.

Description

Fiber pulp wet blank nondestructive dehydration shaping method and wet blank nondestructive dehydration shaping module

Technical Field

The patent application relates to a fiber pulp molding method and a dewatering and shaping device.

Background

The fiber pulp adsorption molding method can be used for producing three-dimensional paper-plastic products with light weight, good strength, good buffering elasticity and various shapes in batch. The molding method of fiber pulp is that a suction mold is sunk in a pulp tank to reach a certain pulp suction thickness, and then a transfer mold is used for transferring and spitting, and the wet blank in the process still contains much free water even though the wet blank is dehydrated in a suction state, so that the strength of the wet blank is low, and the wet blank directly spitted is easy to collapse, stack and wrinkle, thus the yield of products is low. Therefore, dehydration shaping is carried out before discharging, so that the wet blank is clamped and pressed in a convex-concave mould in the shaping process to remove free water, and then demoulding and drying are carried out, so that the strength of the wet blank can be improved, and the consumption of subsequent drying cost can be greatly reduced.

However, the existing dehydration and sizing method for sizing the punch and die still has the technical problem of low yield, and the reason is that: the thickness of a wet blank obtained by plastic suction is about 2mm generally, the thickness after dehydration is reduced to 1mm, and the error is +/-0.2 mm, and we should see that the shaping process requires comprehensive shaping and pressing between die surfaces on one hand, and also considers that the completeness and no deformation of the wet blank are ensured when the dies of the shaping male die and the shaping female die are drawn after dehydration shaping on the other hand, so the drawing slope between the shaping male die and the shaping female die is generally larger, the minimum drawing slope is not lower than 5 degrees, when the angle is less than 5 degrees, the wet blank is easy to scratch in the drawing of the shaping male die and the shaping female die, the situations that the wet blank is scratched and the wall thickness is uneven are inevitable and often occur, and therefore, the yield of the blank with small drawing. In order to improve the yield, the method can only reduce the drawing depth and the dehydration pressure between the shaping punch-die and the shaping die, and is realized by sacrificing the dehydration rate, but the energy consumption and the use time of the subsequent drying process are inevitably increased, the production period is prolonged, the production cost pressure is increased, and the product is difficult to meet the actual requirements of large depth, high strength and higher surface smoothness.

It can be known from the above that there is a mutual clamping relationship between the draft angle of the forming punch and die and the dehydration degree, so that the production capacity is difficult to meet more diversified packing material requirements including the requirements of the structure, shape, size and depth index of the containing cavity, and the thickness, the angle of the containing cavity and the surface smoothness cannot meet the strict requirements of high-grade packing of products, so that the existing fiber pulp three-dimensional paper-plastic products can only be used as medium and low-grade packing materials of products, and cannot be used as packing boxes and packing liners of high-grade products such as high-grade jewelry, high-grade cosmetics, high-grade wine, high-grade utensils and the like.

Disclosure of Invention

The invention aims to break the clamping relation between the draft angle and the dehydration degree of the sizing punch-die and the sizing die, provide a fiber pulp wet blank lossless dehydration sizing method and a wet blank lossless dehydration sizing module, and enable the thickness of the sizing wet blank to be thinner, the draft angle to be upright, the dehydration to be more thorough and the surface to be smooth on the basis of greatly improving the yield of fiber pulp three-dimensional paper-plastic products, so that the fiber pulp three-dimensional molding packaging product can be a high-grade product.

The application provides a fibre thick liquids plastic uptake wet base nondestructive dehydration design method technical scheme, its main technical content is: a fiber pulp wet blank lossless dewatering shaping method comprises the following steps: the inner side and the outer side of the surface of the plastic absorption mold and the surface of the sizing mold are sleeved with each other, the sizing mold is two split slip molds which are split and slide on the left and the right, the two split slip molds are synchronously driven to extrude and remove the free water of the wet blank in the relative extrusion and sliding process of the surface of the plastic absorption mold and the surface of the plastic absorption mold until the split slip molds and the surface of the plastic absorption mold are shaped and matched, the shaping of the wet fiber pulp blank is completed, and then the two split slip molds synchronously slide in the reverse direction and are far away from the surface of the plastic absorption mold.

In a preferred technical means of the above-mentioned overall technical solution, the two split slip forms simultaneously press and slide against the surface of the suction mold, and apply longitudinal pressure to the surface of the suction mold.

The application also provides a wet blank lossless dehydration shaping module for realizing the fiber pulp wet blank lossless dehydration shaping method, the wet blank lossless dehydration shaping module is a male die shaping module which comprises a shaping male die, a shaping die sliding frame and a shaping wedge die part, wherein the shaping male die is two half split sliding dies which are arranged on a sliding rail of a frame body in the shaping die sliding frame in a sliding way and slide relatively in an opening and closing way, and a reset pressure spring is arranged between the two half split sliding dies and the shaping die sliding frame; the die holder plate of the shaping wedge die part is provided with a wedge die positioned in a wedge gap between the two split sliding dies, the die holder plate of the shaping wedge die part is parallel to the shaping die sliding frame, a pressure spring is arranged between the die holder plate of the shaping wedge die part and the shaping die sliding frame, and a directional sliding column between the die holder plate and the shaping die slides to drive the wedge die to wedge into and open the wedge gap.

The application provides a wet blank lossless dewatering shaping module for realizing the above fiber pulp wet blank lossless dewatering shaping method, which is a female die shaping module and comprises a shaping female die, a shaping die sliding frame and a shaping wedge die part, wherein the shaping female die is two half split sliding dies which are arranged on a sliding rail of an inner frame body of the shaping die sliding frame in a sliding manner and slide relatively in an opening and closing manner; two symmetrical inclined guide posts which are respectively in sliding fit with the two split sliding forms are fixed on a die base plate of the shaping wedge die part, vertical directional sliding posts are arranged on two sides of the shaping wedge die part, the die base plate is parallel to the shaping die sliding frame, the two split sliding forms slide on the directional sliding posts through a pressure spring, and the two split sliding forms synchronously slide relative to the shaping die assembly or slide separately along the inclined guide posts.

The technical scheme of the fiber pulp wet blank lossless dehydration shaping method and the wet blank lossless dehydration shaping module group disclosed by the patent application breaks the clamping relation between the draft angle of the shaping convex-concave die and the dehydration degree, can realize the wet blank shaping and the draft reaching the right angle draft angle and deeper accommodating cavity depth, can fully mold and shape the wet blank, can smoothly discharge the wet blank after shaping, can not scratch and damage in the mold closing and discharging operation, can finish the shaping operation with higher dehydration and shaping requirements, can obtain a three-dimensional paper-plastic product with thinner thickness, higher strength, higher density and smoother surface, can meet the severe technical requirements of high-grade goods on the packing box and the packing lining layer of high-grade products such as high-grade jewelries, high-grade utensils, high-grade wines, high-grade cosmetics and the like, the technical scheme has the technical advantages of high dehydration and shaping efficiency, high yield, small pressure of subsequent procedures and low cost, and the obtained three-dimensional paper-plastic product can meet more extensive and diversified requirements in the aspects of containing cavity structure, shape, size, depth and the like.

Drawings

FIG. 1 is a three-dimensional structure diagram of a wet blank lossless dewatering and shaping module of a male die shaping module.

Fig. 2 is a front view structural diagram of fig. 1.

Fig. 3 is a side view structural view of fig. 1.

FIG. 4 is a structural diagram of a wet blank lossless dewatering and shaping module of the female die shaping module.

Fig. 5 is a state diagram of an expanded state of the sizing die.

Fig. 6 is a mold clamping state diagram of fig. 4.

Fig. 7 is a state diagram of the mold clamping state of fig. 5.

Detailed Description

The application discloses a fiber pulp wet blank lossless dehydration shaping method, which comprises the following steps: sinking a plastic uptake mold into the slurry in the slurry tank, starting negative pressure plastic uptake, adsorbing a wet blank of a fiber slurry layer with adsorption thickness on the surface of the adsorption mold, and then lifting and separating the wet blank from the slurry; the suction mould and the shaping mould surface of the wet blank with the fiber pulp layer are sleeved, wherein the shaping mould is two half split slip moulds which are split left and right and can be opened and closed in a horizontal sliding mode, the two half split slip moulds are driven to synchronously and longitudinally move close to the suction mould surface of the suction mould, pressure is applied to the suction mould surface of the suction mould, free water is gradually squeezed and removed until the split slip moulds and the suction mould surface are matched in a shaping mode, the dehydration and shaping of the wet blank with the fiber pulp layer are completed, then the two half split slip moulds reversely and synchronously slide, the two half split slip moulds are moved away from the suction mould surface of the suction mould, the suction mould is longitudinally moved out, and the separation of the shaping mould and the.

The application also discloses a wet blank lossless dewatering shaping module for realizing the above fiber pulp wet blank lossless dewatering shaping method. The wet blank nondestructive molding module is a male die molding module corresponding to the profile of the suction mold surface of the female die surface. As shown in fig. 1, 2 and 3, the forming device comprises a forming punch 1, a forming slide frame 2 and a forming wedge part 3. The shaping male die 1 is formed by symmetrically arranging two half split sliding dies 11 and 12 on a frame body sliding rail 20 in a shaping die sliding frame 2 in a sliding mode, and a wedge-shaped gap 10 is formed between the two split sliding dies 11. The embodiment shows a tetragonal shaping die surface, but the shaping die surface is not limited by the embodiment, and can also be various three-dimensional die surfaces such as a polyhedron, a sphere, a cylinder and the like which conform to actual requirements. The wedge-shaped gap 10 preferably runs through a diagonal line of a longitudinal projection of the three-dimensional mold surface, and preferably runs through a bisected diagonal line, so that the two split slip molds 11 and 12 can expand, extrude and apply force to the side surfaces of the suction mold comprehensively and uniformly, the longitudinal force is applied comprehensively, and the comprehensive and uniform dehydration effect is ensured.

The shaping wedge mold part 3 is characterized in that a wedge mold 30 positioned in a wedge-shaped gap (10) between the two split sliding molds 11 and 12 is arranged on a mold seat plate 33 of the shaping wedge mold part, and vertical directional sliding columns 31 are arranged on two sides of the mold seat plate 33. The wedge-shaped body of the wedge-shaped mould 30 with gradually thickened top end to root is fixed between the two directional sliding columns 31, two side surfaces of the wedge-shaped body are surfaces which are matched with the gap end surfaces of the two split sliding moulds 11 and 12, and other surrounding surfaces are matched surfaces which are matched with the two split sliding moulds 11 and 12 into an integral shaping matched mould after being finally wedged into the two split sliding moulds 11 and 12. A reset pressure spring 14 is arranged between the two split sliding forms 11 and 12 and the shaping mold sliding frame 2, and under the action of the reset pressure spring 14, when the wedge mold 30 is opened, the two split sliding forms 11 and 12 automatically contract inwards and move, are combined with longitudinal outward movement, and are separated from the adsorption mold attaching surface of the adsorption mold.

The shaping mold sliding frame 2 is arranged on the directional sliding column 31 in a sliding mode, a pressure spring 34 is arranged between the shaping mold sliding frame 2 and the mold base plate 33, and the shaping mold sliding frame 2 and the mold base plate 33 slide oppositely in a parallel mode under the guiding of the directional sliding column 31.

The shaping convex die 1 is placed into a die cavity of an absorption die with a wet blank of a fiber pulp layer, a longitudinal force is applied to enable a die seat plate 33 to be relatively close to a shaping die sliding frame 2 under the guidance of a directional sliding column 31, a wedge-shaped die 30 is wedged into a wedge-shaped gap 10 between two split sliding dies 11 and 12 along with the die seat plate 33, the two split sliding dies 11 and 12 are forced to synchronously expand until the wedge-shaped die 30 and the two split sliding dies 11 and 12 are combined to form a die closing surface corresponding to the profile of the absorption die surface of the absorption die, and in the process, a large amount of free water of the wet blank of the fiber pulp layer is extruded and removed continuously until the final shaping die closing is realized. And then, the die seat plate 33 is pulled back reversely, under the guide of the directional sliding column 31, the wedge die 30 is relatively far away from the shaping die sliding frame 2, the wedge die is gradually opened out along with the wedge gap 10 between the two split sliding dies 11 and 12, the two split sliding dies 11 and 12 move and contract oppositely under the action of the reset pressure spring 14, and are separated from the plastic uptake die laterally, and the shaping male die 1 is completely separated from the plastic uptake die adsorption die surface by combining with longitudinal outward movement, so that shaping and demoulding are completed.

The application provides a realize the above-mentioned wet base of fiber slurry wet base and can't harm the dehydration design module of wet base of dehydration design method, its another kind be with the terrace die design module that the suction mould adsorption mould face profile of die face corresponds.

As shown in fig. 4 and 5, the forming die comprises a forming concave die 1', a forming die sliding frame 2 and a forming wedge die part 3.

The shaping female die 1 ' is two half split slip forms 11 ' and 12 ' which are arranged on a frame body slide rail 20 in the shaping die slide frame 2 in a sliding way and can be opened and closed relatively left and right. When the two split sliding forms 11 ', 12' are spliced, an integral shaping die matching surface is formed, and the shaping die surface is a tetragonal shaping die surface, but the shaping die surface is not limited by the embodiment, and can also be various three-dimensional die surfaces which conform to actual requirements, such as a polyhedral, a spherical, a cylindrical and the like. The mold closing boundary line of the two split sliding molds 11 'and 12' is preferably a diagonal line penetrating through the longitudinal projection of the three-dimensional mold surface, and preferably penetrates through the bisector diagonal line, so that the two split sliding molds 11 'and 12' can contract, extrude and apply force to the side surface of the suction mold comprehensively and uniformly, the longitudinal force is applied comprehensively, and the comprehensive and uniform dewatering and shaping effects are ensured.

Two symmetrical inclined guide posts 30 ' which are respectively matched with the two split sliding forms 11 ' and 12 ' in a sliding manner are fixed on a die base plate 33 of the shaping wedge die part 3, and vertical directional slide posts 31 are arranged on two sides of the die base plate 33. The directional slide column 31 is a slide guide rail for relative sliding of the shaping mold slide frame 2 and the mold base plate 33, and a pressure spring 34 is arranged between the shaping mold slide frame 2 and the mold base plate 33. As shown in fig. 4 and 6, the two inclined guide posts 30 'have symmetrical outward-expanding slopes, and the two split sliding forms 11', 12 'slide on the inclined guide posts 30' on the corresponding sides, respectively.

The suction mould with the wet fiber pulp layer blank is placed into a mould cavity of a shaping female mould 1 ', longitudinal force is applied to enable a mould seat plate 33 to be relatively close to a shaping mould sliding frame 2 under the guidance of a directional sliding column 31, the two split sliding moulds 11' and 12 'are synchronously close to adduction along an inclined guide column 30', until the two split sliding moulds 11 'and 12' are spliced into a shaping mould surface corresponding to the profile of the suction mould surface, and in the process, a large amount of free water of the wet fiber pulp layer blank is continuously extruded and removed until the wet fiber pulp layer blank is finally shaped and matched; and then the mold base plate 33 is pulled back reversely, under the guide of the directional slide column 31, the two split sliding molds 11 ', 12 ' are relatively far away from the shaping mold slide frame 2, and are synchronously expanded and separated along the inclined guide column 30 ', and are simultaneously separated from the adsorption mold surface of the suction mold in the lateral direction and the longitudinal direction, so that shaping and demolding are completed.

Claims (9)

1. A fiber pulp wet blank lossless dehydration shaping method is characterized in that the method comprises the following steps: the inner side and the outer side of the surface of the plastic absorption mold and the surface of the sizing mold are sleeved with each other, the sizing mold is two split slip molds which are split and slide on the left and the right, the two split slip molds are synchronously driven to extrude and remove the free water of the wet blank in the relative extrusion and sliding process of the surface of the plastic absorption mold and the surface of the plastic absorption mold until the split slip molds and the surface of the plastic absorption mold are shaped and matched, the shaping of the wet fiber pulp blank is completed, and then the two split slip molds synchronously slide in the reverse direction and are far away from the surface of the plastic absorption mold.

2. The method for lossless dewatering sizing of wet fiber pulp according to claim 1, wherein the longitudinal pressure is applied to the suction surface of the suction mold while the two separate slip forms simultaneously press and slip against the suction surface of the suction mold.

3. The wet blank lossless dewatering and shaping module for realizing the fiber pulp wet blank lossless dewatering and shaping method is characterized in that the wet blank lossless dewatering and shaping module is a male die shaping module which comprises a shaping male die (1), a shaping die sliding frame (2) and a shaping wedge die part (3), wherein the shaping male die (1) is a left half split sliding die and a right half split sliding die (11 and 12) which are arranged on a frame sliding rail (20) in the shaping die sliding frame (2) in a sliding manner and slide relatively in an opening and closing manner, and a reset pressure spring (14) is arranged between the two split sliding dies (11 and 12) and the shaping die sliding frame (2); the wedge-shaped die (30) located in the wedge-shaped gap (10) between the two split sliding dies (11 and 12) is arranged on the die seat plate (33) of the shaping wedge die part (3), the die seat plate (33) of the shaping wedge die part (3) is parallel to the shaping die sliding frame (2), a pressure spring (34) is arranged between the two, and a directional sliding column (31) between the two slides to drive the wedge-shaped die (30) to wedge and open the wedge-shaped gap.

4. The non-destructive wet-blank dewatering and sizing module according to claim 3, characterized in that the wedge-shaped gap (10) is arranged across a diagonal of the longitudinal projection of the sizing punch die face.

5. The non-destructive wet-green dewatering and shaping module according to claim 4, wherein the wedge-shaped gap (10) is defined on a bisector diagonal of a longitudinal projection through the three-dimensional mold surface.

6. The wet blank non-destructive dehydration shaping module according to claim 3 or 4, characterized in that the wedge-shaped mold (30) is a wedge-shaped body whose top end to root end is gradually thickened, and both side surfaces thereof are surfaces which are matched with the gap end surfaces of the two split sliding molds (11, 12), and the other surrounding surfaces are provided with split surfaces which are finally wedged into the two split sliding molds (11, 12) and then are split with the two split sliding molds (11, 12) to form an integral shaping mold.

7. The wet blank lossless dewatering and shaping module for realizing the fiber pulp wet blank lossless dewatering and shaping method according to any one of claims 1-2, is characterized in that the wet blank lossless dewatering and shaping module is a female die shaping module and comprises a shaping female die (1 '), a shaping die sliding frame (2) and a shaping wedge die part (3), wherein the shaping female die (1') is two half split sliding dies (11 ', 12') which are slidably arranged on a frame body sliding rail (20) in the shaping die sliding frame (2) and can slide in a left-right opposite opening and closing manner; two symmetrical inclined guide posts (30 ') which are respectively in sliding fit with the two split sliding forms (11', 12 ') are fixed on a die base plate (33) of the shaping wedge die part (3), vertical directional sliding posts (31) are arranged on two sides of the die base plate, the die base plate (33) is parallel to the shaping die sliding frame (2), the two split sliding forms slide on the directional sliding posts (31) through pressure springs (34), and the two split sliding forms (11', 12 ') synchronously and relatively shape, close the dies or separate the sliding along the inclined guide posts (30').

8. A non-destructive wet-blank dewatering and shaping module according to claim 7, characterized in that the parting line of the two separate slip-forms (11 ', 12') is arranged across the diagonal of the longitudinal projection of the shaping die surface.

9. A non-destructive wet-blank dewatering and shaping module according to claim 8, characterized in that the parting line of the two separate slip-forms (11 ', 12') runs on the bisecting diagonal of the longitudinal projection of the shaping die surface.

Images