Hot melting forming auxiliary system for automobile plastic fuel tank

Abstract

The utility model relates to an automobile plastic fuel tank hot melting forming auxiliary system which comprises a moving unit and a fixing unit, the moving unit comprises a moving unit profiling block, a Z-direction air cylinder and a transverse air cylinder, and the moving unit profiling block is fixed to the piston end of the transverse air cylinder through a first profiling block fixing base. The transverse air cylinder is fixed to the piston end of the Z-direction air cylinder through the transverse air cylinder fixing base, and the Z-direction air cylinder is installed on the unit fixing bottom plate. The fixing unit comprises a fixing unit profiling block and a fixing profile, the fixing unit profiling block and the moving unit profiling block are both used for making contact with a plate, the fixing unit profiling block is fixed to the top end of the fixing profile, the fixing profile is vertically arranged, the bottom end of the fixing profile is fixed to a unit fixing bottom plate, and the unit fixing bottom plate is fixed to a robot. The heated plastic plate is driven by the robot to be formed; the oil tank shell forming die can be suitable for manufacturing oil tank shells in irregular shapes, the wall thickness of the shells is more uniform, the production efficiency is improved, and the product manufacturing cost is saved.

Description

[Technical field]

[0001] The utility model relates to the field of automobile plastic fuel tank molding, in particular to an automobile plastic fuel tank hot-melt molding auxiliary system. [Background Technology]

[0002] Traditional fuel tank production is often completed through blow molding technology. When hot melt technology is used to make plastic fuel tanks, the heated sheet is transported to the top of the horizontally placed open mold cavity. After the mold cavity receiving mechanism receives the soft sheet, the receiving mechanism moves the sheet toward the mold cavity. At this time, the molding auxiliary system installed on the robot moves to the top of the sheet, and the anti-form block contacts the soft sheet. The robot and the receiving mechanism move synchronously. During the movement, various anti-form blocks push the sheet in the X, Y, and Z directions according to the requirements of the mold cavity shape, so that the sheet creeps in a certain direction to meet the mold cavity's requirements for the sheet material. When approaching the bottom of the mold cavity, the mold vacuum is turned on at the same time. Under the reaction of the vacuum force, the plastic sheet is adsorbed on the inner wall of the mold cavity according to the shape of the mold cavity. The single-piece plastic tank shell is formed, and the other single-piece shell is completed synchronously. After the mold is closed, the plastic tank is completed.

[0003] However, when hot-melt technology is used to manufacture plastic fuel tanks, there are major shortcomings such as being unable to adapt to the manufacture of irregularly shaped tank shells, uneven shell wall thickness, and low production efficiency. [Contents of the utility model]

[0004] The purpose of the utility model is to solve the above-mentioned shortcomings and provide a hot melt forming auxiliary system for automobile plastic fuel tanks, which can be applied to the production of irregularly shaped fuel tank shells, and the shell wall thickness is more uniform, while improving production efficiency and saving product manufacturing costs.

[0005] In order to achieve the above-mentioned purpose, a hot melt forming auxiliary system for automobile plastic fuel tanks is designed, comprising a motion unit and a fixed unit, wherein the motion unit comprises a motion unit profiling block, a Z-direction cylinder 12 and a transverse cylinder 15, wherein the motion unit profiling block is fixed to the piston end of the transverse cylinder 15 through a profiling block-fixing base 16, wherein the transverse cylinder 15 is fixed to the piston end of the Z-direction cylinder 12 through a transverse cylinder fixing base 14, wherein the Z-direction cylinder 12 is mounted on a unit fixed base 18; wherein the fixed unit comprises a fixed unit profiling block and a fixed profile, wherein the fixed unit profiling block and the motion unit profiling block are both used to contact with and push the sheet material, wherein the fixed unit profiling block is fixed to the top of the fixed profile, wherein the fixed profile is arranged vertically, wherein the bottom end of the fixed profile is fixed to the unit fixed base 18, wherein the unit fixed base 18 is fixed to a robot, and the robot drives the heated plastic sheet material to be formed.

[0006] Furthermore, at least two of the moving units and the fixed units are provided, and the at least two moving units and the fixed units are distributed on the unit fixed bottom plate 18 according to the shape of the mold cavity.

[0007] Furthermore, the Z-direction cylinder 12 is installed on a Z-direction cylinder fixing plate 11 , which is arranged vertically. The Z-direction cylinder fixing plate 11 is fixed on a cylinder mounting plate fixing base 10 , and the cylinder mounting plate fixing base 10 is fixed on a unit fixing base plate 18 .

[0008] Furthermore, the fixed profile is made of aluminum profile, the bottom end of the fixed profile is fixed in the profile fixing base 8, base fixing blocks 9 are symmetrically provided on both sides of the profile fixing base 8, and the profile fixing base 8 is fixed to the unit fixing base plate 18 through the base fixing blocks 9.

[0009] Furthermore, a single motion unit is provided, which includes a single motion unit imitation block, a transverse cylinder 17 and a fixed profile 2. The single motion unit imitation block is fixed to the piston end of the transverse cylinder 17, the transverse cylinder 17 is fixed to the top of the fixed profile 2, and the bottom end of the fixed profile 2 is installed on the unit fixed base plate 18.

[0010] Furthermore, there are two of the moving units and the single moving units, and there are three of the fixed units. The two moving units, two single moving units and three fixed units are distributed on the unit fixed bottom plate 18 according to the mold cavity structure, and are used to complete the molding of the upper shell of the oil tank.

[0011] Furthermore, the motion unit profiling blocks in the motion unit include profiling block one 1 and profiling block two 2, and the profiling block one 1 and profiling block two 2 both move in the Z direction and in the lateral direction driven by the Z-direction cylinder 12 and the lateral cylinder 15. The single motion unit profiling blocks in the single motion unit include profiling block four 4 and profiling block five 5, and the profiling block four 4 and profiling block five 5 both move in the lateral direction driven by the lateral cylinder two 17. The fixed unit profiling blocks in the fixed unit include profiling block three 3, profiling block six 6 and profiling block seven 7.

[0012] Compared with the prior art, the utility model has the following advantages:

[0013] (1) More suitable for the production of irregularly shaped fuel tank shells: the more complex the shape of the mold cavity, the greater the role of the auxiliary molding system, and the better it can drag the heated sheet to the inner wall of the mold cavity;

[0014] (2) Save time and improve production efficiency: If the auxiliary molding system is not used, the efficiency of vacuum force adsorbing the sheet in the mold cavity is very low. After using the auxiliary molding system, the efficiency is greatly improved;

[0015] (3) The shell wall thickness is more uniform: the auxiliary molding system can be used to move the sheet at the high point of the mold cavity toward the low point of the mold cavity, thereby adjusting the shell wall thickness;

[0016] (4) The utility model can promote the molding of the plate by the mold, improve the production efficiency, and save the cost of product manufacturing;

[0017] In summary, the utility model has a novel and simple structure and a reasonable design. It is different from the auxiliary molding structure designed for the hot melt process of the traditional fuel tank manufacturing process on the market. The auxiliary molding system saves the manufacturing cost of the equipment and improves the production efficiency, and is worthy of promotion and application. [Drawings]

[0018] Figure 1 It is a structural schematic diagram of the utility model;

[0019] Figure 2 It is a schematic diagram of the assembly of the motion unit of the utility model;

[0020] Figure 3 It is a schematic diagram of the assembly of the fixing unit of the utility model;

[0021] Figure 4 It is a structural schematic diagram of the lower die auxiliary molding system of the mold;

[0022] In the figure: 1, profiling block 1; 2, profiling block 2; 3, profiling block 3; 4, profiling block 4; 5, profiling block 5; 6, profiling block 6; 7, profiling block 7; 8, profile fixing base; 9, base fixing block; 10, cylinder mounting plate fixing base; 11, Z-direction cylinder fixing plate; 12, Z-direction cylinder; 13, cylinder throttle valve 1; 14, horizontal cylinder fixing base; 15, horizontal cylinder; 16, profiling block 1 fixing base; 17, horizontal cylinder 2; 18, unit fixing base; L1, lower profiling block 1; L2, lower profiling block 2; L3, lower profiling Block three; L4, lower imitation block four; L5, lower imitation block five; L6, lower imitation block six; L7, lower imitation block seven; L8, lower imitation block eight; L9, lower imitation block nine; L10, lower imitation block ten; L11, lower imitation block eleven; L12, profile fixing base two; L13, base fixing block two; L14, cylinder mounting plate fixing base two; L15, cylinder throttle valve two; L16, Z-direction cylinder fixing plate two; L17, cylinder mounting plate fixing base three; L18, Z-direction cylinder two; L19, aluminum profile two; L20, horizontal cylinder three. [Specific implementation method]

[0023] As attached Figure 1As shown, the utility model provides an auxiliary system for hot-melt forming of a plastic fuel tank for automobile, comprising a moving unit and a fixed unit, the moving unit comprising a moving unit profiling block, a Z-direction cylinder 12 and a transverse cylinder 15, the moving unit profiling block is fixed to the piston end of the transverse cylinder 15 through a profiling block-fixing base 16, the transverse cylinder 15 is fixed to the piston end of the Z-direction cylinder 12 through a transverse cylinder fixing base 14, and the Z-direction cylinder 12 is installed on a unit fixed bottom plate 18; the fixed unit comprises a fixed unit profiling block and a fixed profile, the fixed unit profiling block and the moving unit profiling block are both used to contact with and push the plate, the fixed unit profiling block is fixed to the top of the fixed profile, the fixed profile is arranged vertically, the bottom end of the fixed profile is fixed to the unit fixed bottom plate 18, the unit fixed bottom plate 18 is fixed to a robot, and the robot drives the heated plastic plate to be formed.

[0024] There are at least two moving units and fixed units, and at least two moving units and fixed units are distributed on the unit fixed base plate 18 according to the shape of the mold cavity. The Z-direction cylinder 12 is installed on the Z-direction cylinder fixed plate 11, and the Z-direction cylinder fixed plate 11 is arranged vertically. The Z-direction cylinder fixed plate 11 is fixed on the cylinder mounting plate fixed base 10, and the cylinder mounting plate fixed base 10 is fixed on the unit fixed base plate 18; the fixed profile is made of aluminum profile, and the bottom end of the fixed profile is fixed in the profile fixed base 8. The base fixing blocks 9 are symmetrically arranged on both sides of the profile fixed base 8, and the profile fixed base 8 is fixed to the unit fixed base plate 18 through the base fixing blocks 9.

[0025] The utility model is also provided with a single motion unit, which includes a single motion unit imitation block, a transverse cylinder 2 17 and a fixed profile 2, the single motion unit imitation block is fixed to the piston end of the transverse cylinder 2 17, the transverse cylinder 2 17 is fixed to the top of the fixed profile 2, and the bottom of the fixed profile 2 is installed on the unit fixed bottom plate 18. The motion unit and the single motion unit can be provided with two, and the fixed unit can be provided with three, and the two motion units, two single motion units and three fixed units are distributed on the unit fixed bottom plate 18 according to the mold cavity structure, and are used to complete the action of forming the upper shell of the oil tank. Specifically, the motion unit profiling blocks in the motion unit include profiling block one 1 and profiling block two 2, and both profiling block one 1 and profiling block two 2 move in the Z direction and in the lateral direction driven by the Z direction cylinder 12 and the lateral cylinder 15. The single motion unit profiling blocks in the single motion unit include profiling block four 4 and profiling block five 5, and both profiling block four 4 and profiling block five 5 move in the lateral direction driven by the lateral cylinder two 17. The fixed unit profiling blocks in the fixed unit include profiling block three 3, profiling block six 6 and profiling block seven 7.

[0026] The automatic forming auxiliary system for rapid forming of the oil tank shell described in the utility model is composed of a number of units. The number of units is determined by the depth and position relationship of the mold cavity. The units are divided into two types: one is a movable unit and the other is a fixed unit. The moving unit is composed of a profiling block, a telescopic cylinder, a fixed profile, a fixed base, a fixed base plate and a robot. The fixed unit is composed of a profiling block, a fixed profile, a fixed base, a fixed base plate and a robot. A set of forming auxiliary system is composed of a number of moving units and fixed units fixed on the base plate in a certain arrangement. The length, size and telescopic distance of the units are designed according to the depth of the mold cavity, the position relationship and the amount of material required. These units are uniformly fixed on a base plate, and the base plate is fixed on the robot. The robot leads the system to form the heated plastic sheet. During the forming process, the system speed can be set synchronously by the robot and the receiving plate device. According to the depth of the mold cavity reached by the robot, the cylinder is controlled to telescope and push the plate to creep.

[0027] One of the motion units is assembled as shown in the attached Figure 2 As shown in the figure, several units are designed according to the shape of the mold cavity. One of the fixed units is assembled as shown in the figure. Figure 3 As shown, several units are designed according to the mold cavity shape. Figure 1 It is a mold upper die auxiliary molding system designed for the molding of the upper shell of the fuel tank. It mainly consists of four motion units and three fixed units distributed on the bottom plate according to the mold cavity structure, and then the bottom plate is fixed on the robot. Figure 4 It is a mold lower die auxiliary molding system, designed for the molding of the lower shell of the fuel tank. Figure 1 Similarly, I will not repeat it here. It mainly consists of seven motion units and four fixed units distributed on the base plate according to the mold cavity structure, and then the base plate is fixed on the robot.

[0028] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments:

[0029] As attached Figure 1 As shown, the utility model includes 7 working units, 4 of which are motion unit structures and 3 are fixed unit structures. According to the name of the profiling block, profiling block 1 corresponds to unit 1...profiling block 7 corresponds to unit 7, wherein units 1 and 2 are compound motion units that can simultaneously satisfy Z-direction and lateral motion; units 4 and 5 are single motion units that only move lateral; units 3, 6 and 7 are fixed unit structures; 7 units are fixed on the bottom plate according to the structural distribution of the mold cavity, and the bottom plate is installed on the robot, thereby forming a molding system.

[0030] Compound motion units one and two are composed of a profiling block, a transverse cylinder, a Z-direction cylinder, and a fixed base. The motion mode of units one and two is that when they are far away from the bottom of the cavity, they move in the Z direction and retract after moving a certain distance. At this time, the transverse cylinder starts to move and pushes the sheet to the vicinity of the inner wall of the cavity. Motion units four and five are composed of a profiling block, a transverse cylinder, a profile, and a fixed base. Their motion mode is to push the sheet to creep at the appropriate position according to the amount of product material required for the cavity. Fixed units three, six, and seven are composed of a profiling block, a profile, and a fixed seat. Their motion mode only runs with the speed of the robot and pushes the sheet to the vicinity of the cavity wall. While the seven units move with the robot, individual units move at different positions to finally complete the action of forming the entire sheet.

[0031] Requirements for the material of the profiling block: temperature resistance 280-320 degrees Celsius, thermal conductivity <0.05W / mk, density 60-70g / cm 3 , the peeling force on polyethylene is <0.60N / 25mm, and it has machinability.

[0032] The entire manufacturing process of the utility model is directly integrated into the whole machine system to complete the processing process automatically during use, saving time and improving production efficiency. When it is applied to the new technology to make the oil tank, in order to make the heated plastic sheet molded in the mold cavity faster and more flexibly, a set of various mold cavity profiling block integrated systems are designed to push the soft sheet to complete the half shell molding.

[0033] The working process of the molding system during the fuel tank manufacturing process is as follows:

[0034] 1. The mold carrier opens parallel to 180 degrees, that is, the upper mold and the lower mold are opened at the same time, which is convenient for upper operation;

[0035] 2. Move two heated soft plastic sheets to the top of the two half molds;

[0036] 3. There is a lifting system around each of the two molds to obtain the plastic sheet, and the lifting mechanism uses vacuum adsorption to obtain the soft sheet;

[0037] 4. The sheet transport mechanism returns and the area above the mold is cleared;

[0038] 5. Move the two sets of forming mechanisms to the top of the sheet under the operation of the robot;

[0039] 6. The molding mechanism moves into the mold cavity together with the sheet on the receiving sheet mechanism. The working process is as follows:

[0040] 1) The outer surfaces of all the profiling blocks in the forming mechanism are in contact with the sheet surface (the profiling block surface is smooth, high temperature resistant, does not react with the sheet, and does not stick);

[0041] 2) Depending on the local depth of the cavity, the robot can move in the X or Y direction as a whole, so that part of the sheet is moved to where the demand is greater;

[0042] 3) When the forming mechanism (driven by a 6-axis kuka robot) moves toward the inner wall of the cavity together with the sheet, the Z-direction cylinder in the deep part of the cavity extends first, and the profiling block preferentially pushes the sheet downward to obtain more sheets;

[0043] 4) When the forming mechanism moves with the sheet, the lateral cylinder extends and the profiling block pushes the sheet toward the side of the mold cavity;

[0044] 5) When the sheet receiving mechanism falls to the bottom, the robot also reaches the bottom coordinate point. At this time, the molding mechanism pushes all the sheets to a position about 1 cm away from the inner wall of the mold cavity;

[0045] 6) At this time, the molding mechanism remains stationary, waiting for the mold to start vacuum adsorption of the sheet;

[0046] 7. When the two molds reach the position in the molding mechanism, the vacuum is started to absorb the sheet transported by the molding mechanism onto the inner wall of the mold;

[0047] 8. The robot returns to the coordinate origin with the molding mechanism;

[0048] 9. The mold is closed and the fuel tank is formed.

[0049] Summary: The molding mechanism is like a tentacle, pushing the soft plastic sheet to the inner wall of the complex mold cavity with varying depths, while adjusting the amount of sheet required in the local area of ​​the mold cavity to facilitate the mold cavity to absorb the sheet to the inner wall.

[0050] The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in the field. The standard parts used can be purchased from the market, and special-shaped parts can be customized according to the records in the specification and drawings. The specific connection methods of each part adopt mature conventional means such as bolts, rivets, welding, etc. in the prior art. The machinery, parts and equipment adopt conventional models in the prior art, and the circuit connection adopts the conventional connection method in the prior art, which will not be described in detail here.

[0051] The present invention is not limited to the above-mentioned implementation modes, and any other changes, modifications, substitutions, combinations, and simplifications made without departing from the spirit and principle of the present invention shall be considered as equivalent replacement modes and shall be included in the protection scope of the present invention.

Claims

1. A hot melt forming auxiliary system for automobile plastic fuel tanks, characterized in that: The invention comprises a moving unit and a fixed unit, wherein the moving unit comprises a moving unit profiling block, a Z-direction cylinder (12) and a transverse cylinder (15), wherein the moving unit profiling block is fixed to the piston end of the transverse cylinder (15) via a profiling block-fixing base (16), wherein the transverse cylinder (15) is fixed to the piston end of the Z-direction cylinder (12) via a transverse cylinder fixing base (14), wherein the Z-direction cylinder (12) is mounted on a unit fixing base (18); wherein the fixed unit comprises a fixed unit profiling block and a fixed profile, wherein the fixed unit profiling block and the moving unit profiling block are both used to contact with a plate and push the plate, wherein the fixed unit profiling block is fixed to the top of the fixed profile, wherein the fixed profile is arranged vertically, wherein the bottom of the fixed profile is fixed to the unit fixing base (18), wherein the unit fixing base (18) is fixed to a robot, and the robot drives the heated plastic plate to be formed.

2. The automobile plastic fuel tank hot melt forming auxiliary system according to claim 1, characterized in that: At least two of the moving units and the fixing units are provided, and the at least two moving units and the fixing units are distributed on the unit fixing bottom plate (18) according to the shape of the mold cavity.

3. The automobile plastic fuel tank hot melt forming auxiliary system according to claim 1, characterized in that: The Z-direction cylinder (12) is mounted on a Z-direction cylinder fixing plate (11), the Z-direction cylinder fixing plate (11) is arranged vertically, the Z-direction cylinder fixing plate (11) is fixed on a cylinder mounting plate fixing base (10), and the cylinder mounting plate fixing base (10) is fixed on a unit fixing base plate (18).

4. The automobile plastic fuel tank hot melt forming auxiliary system as claimed in claim 1, characterized in that: The fixed profile is made of aluminum profile, the bottom end of the fixed profile is fixed in a profile fixing base (8), base fixing blocks (9) are symmetrically provided on both sides of the profile fixing base (8), and the profile fixing base (8) is fixed to the unit fixing base plate (18) through the base fixing blocks (9).

5. The automobile plastic fuel tank hot melt forming auxiliary system according to any one of claims 1 to 4, characterized in that: A single motion unit is also provided, the single motion unit comprising a single motion unit imitation block, a second transverse cylinder (17) and a second fixed profile, the single motion unit imitation block being fixed to the piston end of the second transverse cylinder (17), the second transverse cylinder (17) being fixed to the top end of the second fixed profile, and the bottom end of the second fixed profile being mounted on the unit fixed bottom plate (18).

6. The automobile plastic fuel tank hot melt forming auxiliary system as claimed in claim 5, characterized in that: The two motion units and the single motion units are each provided with two, and the three fixed units are provided with three. The two motion units, the two single motion units and the three fixed units are distributed on the unit fixed bottom plate (18) according to the mold cavity structure, and are used to complete the action of forming the upper shell of the oil tank.

7. The automobile plastic fuel tank hot melt forming auxiliary system as claimed in claim 6, characterized in that: The motion unit profiling block in the motion unit comprises a profiling block one (1) and a profiling block two (2), and the profiling block one (1) and the profiling block two (2) are driven by a Z-direction cylinder (12) and a transverse cylinder (15) to move in the Z direction and in the transverse direction. The single motion unit profiling block in the single motion unit comprises a profiling block four (4) and a profiling block five (5), and the profiling block four (4) and the profiling block five (5) are driven by a transverse cylinder two (17) to move in the transverse direction. The fixed unit profiling block in the fixed unit comprises a profiling block three (3), a profiling block six (6) and a profiling block seven (7).

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