CN112518974B

CN112518974B - Extrusion molding apparatus and extrusion molding method

Info

Publication number: CN112518974B
Application number: CN202011217765.2A
Authority: CN
Inventors: 邬全兵; 张琼; 李宁
Original assignee: Guangdong Bozhilin Robot Co Ltd
Current assignee: Guangdong Bozhilin Robot Co Ltd
Priority date: 2020-11-04
Filing date: 2020-11-04
Publication date: 2022-02-08
Anticipated expiration: 2040-11-04
Also published as: CN112518974A

Abstract

The embodiment of the invention provides an extrusion forming device which is used for producing prefabricated parts. The conveying mechanism comprises a conveying line. The template assembly is arranged on the conveying line, and the conveying line conveys the template assembly along the conveying path. The extrusion molding machine is used for extruding and molding the prefabricated member, the extrusion molding machine is movably arranged on the conveying path of the conveying line, and the extrusion molding machine is provided with an allowance space for the template assembly to pass through. When the template assembly moves to the allowable space along with the conveying line, the template assembly is switched to a static state, the extrusion forming machine moves relative to the template assembly in the static state, and the position of the template assembly in the static state relative to the conveying line is kept unchanged. When the template assembly moves to the allowable space along with the conveying line, the extrusion forming device provided by the invention moves relative to the template assembly in a static state, has high extrusion compactness and is suitable for automation. The embodiment of the invention also provides an extrusion forming method.

Description

Extrusion molding apparatus and extrusion molding method

Technical Field

The invention relates to the technical field of extrusion forming, in particular to an extrusion forming device and an extrusion forming method.

Background

The traditional extrusion forming production mode mainly comprises two modes, one mode is that a template is built on the ground, an extrusion forming machine extrudes the wallboard on the ground template along a track, and the extrusion force is equivalent to overcome the friction force between the extrusion forming machine and the ground template to push the extrusion forming machine to advance. The ground mold of the method has large floor area, and the extrusion molding machine is inconvenient to feed, so that high automation is difficult to realize; the other mode is that the extrusion forming machine is fixed, the template is continuously conveyed to the lower part of the extrusion forming machine by a conveying line for extrusion forming, and then the template flows back to the extrusion forming machine for recycling after cutting, maintenance and demoulding. The method has the defects of light template, insufficient friction force with a conveying line and low extrusion compactness. The existing extrusion forming method cannot give consideration to both extrusion compactness and automation degree, and is difficult to meet production requirements.

Disclosure of Invention

An object of an embodiment of the present invention is to provide an extrusion molding apparatus and an extrusion molding method, which solve the above problems. The embodiment of the invention achieves the aim through the following technical scheme.

In a first aspect, an embodiment of the present invention provides an extrusion molding apparatus for producing a preform, where the extrusion molding apparatus includes a conveying mechanism, a mold plate assembly, and an extrusion molding machine. The conveying mechanism comprises a conveying line. The template assembly is arranged on the conveying line, and the conveying line conveys the template assembly along the conveying path. The extrusion molding machine is used for extruding and molding the prefabricated member, the extrusion molding machine is movably arranged on the conveying path of the conveying line, and the extrusion molding machine is provided with an allowance space for the template assembly to pass through. When the template assembly moves to the allowable space along with the conveying line, the template assembly is switched to a static state, the extrusion forming machine moves relative to the template assembly in the static state, and the position of the template assembly in the static state relative to the conveying line is kept unchanged.

In one embodiment, the die plate assembly defines at least one guide channel extending parallel to the length of the conveyor line, and the extruder is slidably mounted to the at least one guide channel. Avoid extrusion molding machine at the extrusion in-process, the skew appears in the template subassembly.

In one embodiment, the extrusion molding apparatus further comprises a control mechanism for controlling the movement of the conveyor line or the stationary state of the conveyor line, wherein the control mechanism controls the conveyor line to drive the die plate assembly and the extrusion molding machine to move a preset distance when the extrusion molding machine moves to a preset position relative to the die plate assembly in the stationary state. The control mechanism controls the conveying line to move or stop, and controls the conveying line to drive the die plate assembly and the extrusion forming machine to move for a preset distance when the extrusion forming machine moves to a preset position relative to the die plate assembly in the stop state.

In one embodiment, the control mechanism includes a sensor disposed at a preset position for sensing whether the extrusion press moves to the preset position in the extrusion direction. Whether the extrusion molding machine moves to a preset position along the extrusion direction is sensed.

In one embodiment, the control mechanism further comprises a controller, the conveyor line has a conveying direction, and when the sensor senses that the extrusion molding machine reaches the preset position, the controller controls the template assembly to move a preset distance along with the conveyor line. And controlling the conveying line to move a preset distance along the conveying direction.

In one embodiment, the template assembly comprises a plurality of templates which are arranged at intervals along the conveying direction on the conveying line and sequentially pass through the allowable space of the extrusion forming machine when moving along with the conveying line. Facilitating the cycling of the template assembly.

In one embodiment, the length of the plurality of templates in the conveying direction is the same, and the preset distance is equal to the length of the templates in the conveying direction. The moving distance of the conveying line is convenient to control.

In one embodiment, the conveying mechanism further comprises a mounting base and a driving motor, the conveying line is mounted on the mounting base, and the driving motor is mounted on the mounting base and is in transmission connection with the conveying line. The driving motor drives the conveying line to move.

In one embodiment, the conveyor line includes a plurality of sprockets rotatably mounted to the mounting base and drivingly connected to the drive motor, at least one set of chains wound around the plurality of sprockets, a chain attachment mounted to a surface of the chains remote from the sprockets, and a suction cup electromagnet mounted to the chain attachment and attracting the template assembly to hold the template assembly in place as the template assembly moves with the conveyor line to the allowed space. When the template assembly moves to the allowable space along with the conveying line, the sucker electromagnet adsorbs the template assembly so as to keep the position of the template assembly unchanged.

In a second aspect, embodiments of the present invention further provide an extrusion molding method, which is applied to any one of the extrusion molding apparatuses, and the extrusion molding method includes the steps of: controlling the extrusion molding machine to move, and controlling the conveying line to drive the movable template component to move; and when the template assembly moves to the allowable space along with the conveying line, the template assembly is switched to a static state, and the extrusion forming machine moves relative to the template assembly in the static state.

Compared with the prior art, the extrusion forming device and the extrusion forming method provided by the invention have the advantages that the extrusion forming device comprises the conveying mechanism, the template assembly and the extrusion forming machine. The template assembly is arranged on the conveying line of the conveying mechanism. The extrusion molding machine is movably arranged on the conveying path of the conveying line and is provided with an allowance space for the template assembly to pass through. When the template assembly moves to the allowable space along with the conveying line, the template assembly is switched to the static state, the extrusion forming machine moves relative to the template assembly in the static state, the position of the template assembly in the static state relative to the conveying line is kept unchanged, the extrusion forming machine can perform ground die extrusion forming on the conveying line on the prefabricated member, the extrusion compactness is high, the extrusion uniformity is good, and the extrusion forming machine is suitable for automatic production.

These and other aspects of the invention are apparent from and will be elucidated with reference to the embodiments described hereinafter.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Fig. 1 is a schematic structural view of an extrusion molding apparatus according to an embodiment of the present invention.

Fig. 2 is a schematic structural diagram of a conveying line provided in an embodiment of the present invention.

Fig. 3 is a partial enlarged view of fig. 2 at a.

Fig. 4 is a schematic structural diagram of a first template according to an embodiment of the present invention.

Fig. 5 is a schematic view of an extrusion process of an extrusion molding apparatus according to an embodiment of the present invention.

Fig. 6 is a flow chart of an extrusion molding method according to an embodiment of the present invention.

Detailed Description

In order to facilitate an understanding of the embodiments of the present invention, the embodiments of the present invention will be described more fully hereinafter with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the examples of the present invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

Referring to fig. 1, an embodiment of the present invention provides an extrusion molding apparatus 1 for producing a preform, where the extrusion molding apparatus 1 includes a conveying mechanism 10, an extrusion molding machine 30, and a mold plate assembly 50. The extrusion molding machine 30 is erected on the conveying mechanism 10, and the template assembly 50 is arranged on the conveying mechanism 10 and used for receiving the extruded prefabricated member.

The conveying mechanism 10 includes a conveying line 12. In addition, the conveying mechanism 10 further includes a mounting base 14 and a driving motor 16, and the mounting base 14 can be used for mounting the conveying line 12 and carrying the extrusion molding machine 30. The driving motor 16 is in transmission connection with the conveying line 12 to drive the conveying line 12 to move.

The conveyor line 12 has a moving state in which the conveyor line 12 is moving relative to the mounting base 14 and a stationary state in which the conveyor line 12 is stationary relative to the mounting base 14. The conveyor line 12 has a conveying direction D1 and conveys the stencil assembly 50 along a conveying path, wherein the conveying path refers to the path along which the conveyor line 12 moves in the conveying direction.

Referring to fig. 1, 2 and 3, the conveyor line 12 is mounted to a mounting base 14. Specifically, the conveyor line 12 includes a plurality of sprockets 122, at least one set of chains 124, a chain attachment 126, and a suction cup electromagnet 128. A plurality of sprockets 122 are rotatably mounted to the mounting base 14 and drivingly connected to the drive motor 16. Specifically, one of the plurality of sprockets 122 is mechanically connected to the transmission shaft of the driving motor 16, or several of the plurality of sprockets 122 is mechanically connected to the transmission shafts of the same number of driving motors 16, and the other sprockets 122 are rotatably mounted on the mounting base 14, and the sprockets 122 can be used for supporting at least one set of chains 124 and driving at least one set of chains 124 to rotate. In this embodiment, the sprocket 122 and the chain 124 can be in gear engagement. In other embodiments, a belt drive or other drive may be provided between the sprocket 122 and the chain 124. At least one set of chains 124 is wound around the plurality of sprockets 122. in the present embodiment, the at least one set of chains 124 includes three sets of chains 124, and the three sets of chains 124 are arranged side by side along the width direction of the stencil assembly 50. A chain attachment 126 is mounted to the surface of the chain 124 remote from the sprocket 122 and may be used to mount a suction cup electromagnet 128. The sucker electromagnet 128 is mounted on the chain accessory 126, and the sucker electromagnet 128 is in a magnetic holding type, namely, the magnetic force is generated when the power is off, and the demagnetization is performed after the power is on. Accordingly, the suction cup electromagnet 128 may attract the template assembly 50 in case of power failure, thereby fixing the template assembly 50. Specifically, as the die plate assembly 50 moves with the conveyor line 12 to below the extrusion press 30, the suction cup electromagnets 128 attract the die plate assembly 50 to hold the die plate assembly 50 in place. In this embodiment, the chuck electromagnets 128 on each set or groups of chain attachments 126 can be uniformly controlled to be energized and de-energized. The number of the suction cup electromagnets 128 can be calculated according to the required suction force.

The mounting base 14 includes a mounting platform 141 and a plurality of mounting feet 143, wherein the plurality of mounting feet 143 can support the mounting platform 141, and the mounting platform 141 can be used for fixing the conveyor line 12, the driving motor 16, and other structures. The number of the mounting feet 143 may be three, four or more, and may be set according to actual conditions.

The driving motor 16 is fixedly installed on the installation platform 141, in this embodiment, the driving motor 16 is fixedly installed on one side of the installation platform 141 far away from the conveying line 12, so that the driving motor 16 can be prevented from being exposed to the outside, and the influence of external force on the driving motor 16 can be reduced, for example, the collision of the driving motor 16 can be reduced. The driving motor 16 may be a servo motor or a stepping motor, or may be other types of motors to drive the conveying line 12.

Referring to fig. 1, 4 and 5, a template assembly 50 is disposed on the conveyor line 12. When the template assembly 50 moves to the lower part of the extrusion forming machine 30 along with the conveying line 12, the template assembly 50 is switched to the static state, the extrusion forming machine 30 moves relative to the template assembly 50 in the static state, and the position of the template assembly 50 in the static state relative to the conveying line 12 is kept unchanged, so that the ground-mold extrusion forming of the prefabricated member on the conveying line 12 by the extrusion forming machine 30 can be realized, the extrusion compactness is high, the extrusion uniformity is good, and the automatic production is suitable.

The template assembly 50 is removably attached to the chuck electromagnet 128. In the present embodiment, the die plate assembly 50 may be a ferromagnetic material, such as a ferromagnetic metal, e.g., pig iron, cast iron, etc. When the suction cup electromagnet 128 is de-energized, the template assembly 50 is attracted to the suction cup electromagnet 128 and thereby secured to the conveyor line 12. When the chuck electromagnet 128 is energized, the stencil assembly 50 may be removed from the chuck electromagnet 128. The form assembly 50 may be used to carry prefabricated members to be extruded, such as cement, sand, stone, construction waste, etc., which may be extruded by the extrusion molding machine 30 to form concrete hollow wall panels, and then naturally cured to form porous lightweight wall panels.

The template assembly 50 is provided with at least one guide groove 54, the at least one guide groove 54 extends along the length direction parallel to the conveying line 12, and the at least one guide groove 54 can be used for guiding the moving direction of the extrusion forming machine 30, so that the template assembly 50 is prevented from deviating in the moving process of the extrusion forming machine 30, and the extrusion quality is improved. In the present embodiment, the at least one guide groove 54 includes two guide grooves 54, and the two guide grooves 54 are spaced apart from each other in the direction perpendicular to the conveying direction D1, and more specifically, the two guide grooves 54 are provided at both ends in the width direction of the die plate assembly 50.

Specifically, the die plate assembly 50 may include a plurality of die plates, each of which may have at least one guide slot 54, and the plurality of guide slots 54 may be in communication with each other. The plurality of templates are arranged on the conveying line 12 at intervals along the conveying direction D1, and sequentially pass below the extrusion molding machine 30 when moving along with the conveying line 12, so that the template assembly 50 can be circulated, that is, when one of the templates moves to one end of the mounting base 14 along the conveying direction D1, only the template needs to be moved to the other end of the mounting base 14, and the template assembly 50 can be circulated. The length of a plurality of templates along direction of delivery D1 is the same to the distance of removal of control transfer chain 12, that is to say, only need control transfer chain 12 move the length of a template along direction of delivery D1 at every turn can, guaranteed the homogeneity of extrusion product. In the present embodiment, the plurality of templates includes a first template 51, a second template 52, and a third template 53, wherein the second template 52 is located between the first template 51 and the third template 53. The first template 51, the second template 52 and the third template 53 are all rectangular plate-shaped structures, and the lengths of the first template 51, the second template 52 and the third template 53 in the conveying direction D1 are the same. The distance between the first template 51 and the second template 52 is equal to the distance between the second template 52 and the third template 53. In other embodiments, the plurality of templates may further include a fourth template, a fifth template, or more templates, the fourth template, the fifth template, and the like are sequentially disposed on the conveying line 12 from the third template 53, and the distances between two adjacent templates may also be the same. In other embodiments, the length of each die plate in the feed direction may be different.

In the present embodiment, the lengths of the first die plate 51, the second die plate 52 and the third die plate 53 in the conveying direction D1 are the same in order to control the moving distance of the conveyor line 12, and the preset distance may be equal to the length of the die plate in the conveying direction D1. In other embodiments, the preset distance may also be other set distance values.

Referring to fig. 1, the extrusion molding machine 30 is movably disposed on the conveying path of the conveying line 12 for extruding the preform, wherein the extrusion start position of the extrusion molding machine 30 is an initial position L1, and the extrusion end position is a preset position L2.

The initial position L1 may be located on the side of the first template 51 away from the second template 52, or may be located at the first template 51.

In this embodiment, the predetermined position L2 may correspond to the position of the first mold plate 51 before extrusion, i.e. the extrusion molding machine 30 is not extruded to the end of the first mold plate 51, and is moved along the conveying direction D1 by the conveying line 12. In other embodiments, the preset position L2 may be located between the first die plate 51 and the second die plate 52, and in this case, the extrusion molding machine 30 may extrude the first die plate 51 with the die plate assembly 50 fixed, so that the extrusion compactness is high. In other embodiments, the preset position L2 may also be located at the second template 52, between the second template 52 and the third template 53, and so on.

The extrusion machine 30 moves in an extrusion direction D2. In the present embodiment, the extrusion direction D2 is opposite to the direction of the conveying direction D1 of the conveying line 12 in the moving state, in the present embodiment, the conveying direction D1 is the moving direction of the upper layer portion of the chain 124, and the extrusion direction D2 is the moving direction of the extrusion molding machine 30. In other embodiments, the pressing direction D2 may also intersect the direction of the conveying direction D1 of the moving conveyor line 12.

The extrusion molding machine 30 has a tolerance space 32 for passing a plurality of templates in sequence through the template assembly 50 as they move with the conveyor line 12. When the template assembly 50 moves with the conveyor line 12 to the allowing space 32, the template assembly 50 is switched to the stationary state.

The extrusion molding machine 30 is slidably installed in the at least one guide groove 54, in this embodiment, when the first mold plate 51 and the second mold plate 52 move along the conveying direction D1 to the lower side of the extrusion molding machine 30 along the conveying line 12, the suction cup electromagnet 128 is powered off and fixes the first mold plate 51 and the second mold plate 52, the extrusion molding machine 30 starts to move along the extrusion direction D2 and extrude the preform, and the extrusion compactness is high and the extrusion uniformity is good.

In this embodiment, the extrusion molding machine 30 is in mating contact with the die plate assembly 50 and not in contact with the conveyor line 12, wherein mating contact means that there is sliding friction between the extrusion molding machine 30 and the die plate assembly 50. Because the sliding friction exists between the extrusion molding machine 30 and the template assembly 50, when the conveyor line 12 drives the template assembly 50 to move along the conveying direction D1, the extrusion molding machine 30 can be synchronously driven to move along the conveying direction D1, and no additional driving force needs to be provided to drive the extrusion molding machine 30 to move along the conveying direction D1, so that the degree of automation is high and the production cost is saved. It should be noted that, since the extrusion molding machine 30 moves on the first die plate 51 without contacting the feed line 12, when the feed line 12 pushes the first die plate 51 and the second die plate 52 in the feeding direction D1, the extrusion molding machine 30 is still continuously extruded, and thus the extrusion efficiency will be high. In the embodiment, the moving speed of the extrusion molding machine 30 along the extrusion direction D2 is less than the moving speed of the conveying line 12 along the conveying direction D1, so that the extrusion molding machine 30 can move along the conveying direction D1 relative to the mounting base 14, continuous extrusion molding can be realized, the degree of automation is high, and the extrusion molding machine is suitable for mass production of extrusion molding products.

In this embodiment, the extrusion molding apparatus 1 further includes a control mechanism 70, and the control mechanism 70 is used for controlling the movement of the conveying line 12 or controlling the stationary state of the conveying line 12. When the extrusion molding machine 30 moves to the predetermined position L2 relative to the stationary die plate assembly 50, the control mechanism 70 controls the conveying line 12 to move the die plate assembly 50 and the extrusion molding machine 30 by a predetermined distance.

Referring to fig. 1 and 5, the control mechanism 70 includes a sensor 72 and a controller 74, and the sensor 72 is in signal communication with the controller 74.

The sensor 72 is disposed at the preset position L2, and is used for sensing whether the extrusion molding machine 30 moves to the preset position L2 in the extrusion direction D2. When the sensor 72 senses that the extrusion molding machine 30 reaches the preset position L2, the controller 74 controls the movement of the plate assembly 50 with the transfer line 12 by a preset distance.

The controller 74 may also be in signal communication with the drive motor 16 such that the controller 74 may control the drive motor 16 on or off, speed or direction of rotation, etc., to control the movement or standstill of the conveyor line 12.

The controller 74 may also be in signal communication with the extrusion machine 30 to control the extrusion machine 30 to move in the extrusion direction D2 and extrude.

In this embodiment, the controller 74 may also be in signal communication with the suction cup electromagnet 128 to control the suction cup electromagnet 128 to de-energize and attract the template assembly 50 to hold the template assembly 50 in place while the template assembly 50 is moved with the conveyor line 12 to the allowed space 32.

In summary, the extrusion molding apparatus 1 of the present invention includes a conveying mechanism 10, a die plate assembly 50 and an extrusion molding machine 30. The template assembly 50 is disposed on the conveyor line 12 of the conveyor mechanism 10. The extrusion molding machine 30 is movably disposed on the conveying path of the conveying line 12 and has an allowance space 32 for the passage of the template assembly 50. When the template assembly 50 moves to the allowable space 32 along with the conveying line 12, the template assembly 50 is switched to the static state, the extrusion molding machine 30 moves relative to the template assembly 50 in the static state, and the position of the template assembly 50 in the static state relative to the conveying line 12 is kept unchanged, so that the ground-mold extrusion molding of the prefabricated member on the conveying line 12 by the extrusion molding machine 30 can be realized, the extrusion compactness is high, the extrusion uniformity is good, and the automatic production is suitable.

Referring to fig. 1, 5 and 6, an embodiment of the present invention further provides an extrusion molding method, which is applied to the extrusion molding apparatus 1, and the extrusion molding method includes the steps of:

s1: controlling the extrusion molding machine 30 to move along the extrusion direction D2, and controlling the conveying line 12 to drive the template assembly 50 to move;

firstly, placing a prefabricated member to be formed on a template component 50; the first template 51 and the second template 52 may be placed on the conveying line 12 or fixedly disposed on the conveying line 12, so that the first template 51 and the second template 52 move along the conveying direction D1 along with the conveying line 12.

S2, when the die plate assembly 50 moves to the allowing space 32 along with the conveying line 12, the die plate assembly 50 is switched to the static state, and the extrusion molding machine 30 moves relative to the die plate assembly 50 in the static state.

When the template assembly 50 moves with the conveyor line 12 to the allowing space 32, the controller 74 can switch the conveyor line 12 from the moving state to the stationary state by controlling the driving motor 16 to stop rotating. And the controller 74 controls the suction cup electromagnet 128 (fig. 3) to be de-energized to suck and fix the first and

second templates

51 and 52; the extrusion machine 30 then moves from the initial position L1 in the extrusion direction D2 and extrudes, and the form assemblies 50 receive the wallboard resulting from extrusion of the preforms. Because the formed panels may also require precision cutting, the extrusion machine 30 need not be precisely aligned with one end of the first die plate 51, but rather, need only begin at the extrusion location as a qualified panel.

The extrusion molding method of the embodiment of the invention further comprises the following steps: when the extrusion molding machine 30 moves to the predetermined position L2 along the extrusion direction D2, the conveyor line 12 is controlled to move the template assembly 50 and the extrusion molding machine 30 a predetermined distance along the conveying direction D1.

The extrusion machine 30 may be controlled by the controller 74 and moved in an extrusion direction D2 and extruded. When the sensor 72 senses that the real-time position of the extrusion molding machine 30 is the preset position L2, the controller 74 controls the conveyor line 12 to drive the first template 51 and the second template 52 to move a preset distance along the conveying direction D1, wherein the preset position L2 may be located between the first template 51 and the second template 52. Because template component 50 is fixed at transfer chain 12, and extrusion molding machine 30 and template component 50 cooperation contact, therefore transfer chain 12 when moving along the transfer chain, can drive template component 50 and move along the transfer chain, extrusion molding machine 30 is driven synchronous motion by template component 50 to extrusion molding machine 30 is driving the in-process by template component 50 self and carries out the extrusion along extrusion direction D2, that is to say, extrusion molding machine 30 can not stop the extrusion by the in-process that template component 50 drove. It should be noted that the speed of the extruder 30 moving in the extrusion direction D2 is less than the speed of the conveyor line 12 moving in the conveying direction D1 so that the extruder 30 can move relative to the mounting base 14 in the conveying direction D1.

During the process that the first template 51 and the second template 52 move along the conveying direction D1 for the preset distance, the third template 53 moves for the preset distance along with the second template 52, that is, the conveyor line 12 can simultaneously drive the first template 51, the second template 52 and the third template 53 to move synchronously. In other embodiments, the movement of the third template 53 may be driven by another power.

After controlling the conveying line 12 to move the die plate assembly 50 and the extrusion molding machine 30 by a preset distance along the conveying direction D1, the second die plate 52 and the third die plate 53 after moving are fixed. For example, the controller 74 controls the chuck electromagnet 128 to be energized to attract and fix the second template 52 and the third template 53. The extrusion molding machine 30 is then controlled to continue moving in the extrusion direction D2 and extrusion molding is performed.

When the extrusion molding machine 30 moves to the preset position L2 along the extrusion direction D2, the conveyor line 12 is controlled to drive the second mold plate 52 and the third mold plate 53 to move a preset distance along the conveying direction D1, and when the first mold plate 51 moves to one end of the mounting base 14, the first mold plate 51 can be moved to the other end of the mounting base 14 along the extrusion direction D2, and a cycle is formed without moving other mold plates.

In summary, in the extrusion molding method provided by the present invention, when the template assembly 50 moves to the allowable space 32 along with the conveying line 12, the template assembly 50 is switched to the stationary state, the extrusion molding machine 30 moves relative to the stationary template assembly 50, and the position of the stationary template assembly 50 relative to the conveying line 12 remains unchanged, so that the extrusion molding machine 30 can perform the ground-mold extrusion molding on the preform on the conveying line 12, and the extrusion molding method is not only high in extrusion compactness and good in extrusion uniformity, but also suitable for automated production.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. An extrusion forming apparatus for producing a preform, comprising:

a conveying mechanism comprising a conveying line having a conveying direction;

the template assembly is arranged on the conveying line, and the conveying line conveys the template assembly along a conveying path;

the extrusion forming machine is movably arranged on the conveying path of the conveying line and provided with an allowable space for the template assembly to pass through, the extrusion forming machine and the template assembly have sliding friction, the extrusion forming machine moves along the extrusion direction, the extrusion direction is opposite to or intersected with the conveying direction, and the moving speed of the extrusion forming machine along the extrusion direction is less than that of the conveying line along the conveying direction;

when the template assembly moves to the allowable space along with the conveying line, the template assembly is switched to a static state, the extrusion molding machine moves relative to the template assembly in the static state, and the position of the template assembly in the static state relative to the conveying line is kept unchanged.

2. The extrusion molding apparatus as in claim 1, wherein the die plate assembly defines at least one guide channel extending along a length parallel to the conveyor line, the extrusion molding machine being slidably mounted to the at least one guide channel.

3. The extrusion molding apparatus as claimed in claim 1, wherein the extrusion molding apparatus further comprises a control mechanism for controlling the conveyor line to move or the conveyor line to be stationary, and when the extrusion molding apparatus moves to a predetermined position relative to the stationary mold plate assembly, the control mechanism controls the conveyor line to drive the mold plate assembly and the extrusion molding apparatus to move a predetermined distance.

4. The extrusion apparatus as recited in claim 3 wherein the control mechanism comprises a sensor disposed at the predetermined position for sensing whether the extrusion apparatus is moved to the predetermined position.

5. The extrusion molding apparatus as recited in claim 4 wherein the control mechanism further includes a controller, the conveyor line having a conveying direction, the controller controlling the template assembly to move a predetermined distance with the conveyor line when the sensor senses that the extrusion molding machine reaches the predetermined position.

6. The extrusion molding apparatus as recited in claim 5 wherein the die plate assembly includes a plurality of die plates spaced along the feed line and passing sequentially through the allowed space of the extrusion molding machine as the die plates move with the feed line.

7. The extrusion apparatus as recited in claim 6 wherein a plurality of said die plates are of equal length along said direction of conveyance, said predetermined distance being equal to the length of said die plates along said direction of conveyance.

8. The extrusion molding apparatus as claimed in any one of claims 1 to 7, wherein the conveyor mechanism further includes a mounting base and a drive motor, the conveyor line being mounted to the mounting base, the drive motor being mounted to the mounting base and being in driving connection with the conveyor line.

9. The extrusion molding apparatus as set forth in claim 8 wherein the conveyor line includes a plurality of sprockets rotatably mounted to the mounting base and drivingly connected to the drive motor, at least one set of chains trained about the plurality of sprockets, a chain attachment mounted to a surface of the chain remote from the sprockets, and a suction cup electromagnet mounted to the chain attachment and attracting the template assembly to hold the template assembly in place as the template assembly moves with the conveyor line to the allowed space.

10. An extrusion molding method which is applied to the extrusion molding apparatus according to any one of claims 1 to 9, the extrusion molding method comprising the steps of:

controlling the extrusion molding machine to move, and controlling the conveying line to drive the template assembly to move; and

when the template assembly moves to the allowable space along with the conveying line, the template assembly is switched to a static state, and the extrusion molding machine moves relative to the template assembly in the static state.