JP3694142B2 - Equipment for manufacturing continuous extrusion products with varying cross-sectional shapes - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an extrusion molding of a synthetic resin, and more particularly to an apparatus for manufacturing a continuous extrusion molded article whose cross-sectional shape changes.
[0002]
[Prior art]
For example, a side protection molding 200 for an automobile body as shown in FIG. 9 or a side protection molding 210, 220 for an automobile door as shown in FIG. 10 is used for both protection of the vehicle body and decoration. These moldings (hereinafter referred to as moldings) are made of synthetic resin moldings that are elastic in terms of purpose and function, and have a shape whose cross-sectional shape changes in the longitudinal direction as necessary.
Such a long and synthetic resin molded article whose cross-sectional shape changes in the longitudinal direction can be continuously formed by extrusion molding. FIG. 11 shows a conventionally proposed molding means. As shown in the figure, the shape variable plates 241, 242, and 243 having a mold portion at the front end face the resin material outlet 231 of the extrusion device 230. Along with the extrusion of the resin material, the cylinder devices 251, 252, and 253 provided therein respectively advance and retract to continuously change the cross-sectional shape.
[0003]
As shown in the figure, when there are a plurality of shape change portions of the molded product, a plurality of shape variable plates 241, 242, and 243 are arranged corresponding to the change portions, and the cylinder devices 251, 252, and 253 are respectively arranged. Must be activated. In this case, a facility for installing each cylinder device is required, and a program for causing them to perform a predetermined operation is required. However, it is sometimes difficult to arrange a plurality of cylinder devices corresponding to individual shape variable plates in terms of the space of the extrusion device, and driving adjustment of each cylinder device must be performed correspondingly. Therefore, not only is it complicated, but delicate timing adjustment of the operation between the cylinder devices is necessary, and the complexity is extremely difficult. In addition, the cost of equipment is high.
[0004]
[Problems to be solved by the invention]
Therefore, when the cross-sectional shape of the extruded product is changed by advancing and retreating a plurality of shape variable plates, the present invention operates the plurality of shape variable plates simultaneously and in conjunction with an extremely simple mechanism, which is economical in terms of equipment. It is an object of the present invention to provide a new continuous extrusion product manufacturing apparatus that is advantageous in that it can be easily adjusted.
[0005]
[Means for Solving the Problems]
That is, in the invention of claim 1, at least two or more shape variable plates having a mold portion at the front end face the resin material outlet of the extrusion device, and the shape variable plate is advanced and retracted together with the extrusion of the resin material, An apparatus for continuously extruding an extrusion-molded product having a changed cross-sectional shape, wherein the mold part of each shape variable plate draws a predetermined change locus with respect to the resin material outlet of the extrusion apparatus. In order to move forward and backward, a respective sliding groove for each of the shape variable plates is formed, a driven groove portion is formed in each body portion of the shape variable plate, and in the vicinity of the resin material outlet of the extrusion device. The main driving member connected to the driving member is disposed so as to be movable forward and backward with respect to the outlet, and the main driving member is provided with respective operation shafts that are in sliding contact with the driven groove portions of the respective shape variable plates. The board is the main Respectively in accordance with the reciprocating member so as to form a predetermined sliding, according to the continuous extrusion apparatus for producing the cross-sectional shape changes, characterized in that provided integrally at a predetermined angle with respect to the sliding groove.
[0006]
Further, the invention of claim 2 is the manufacturing apparatus of the continuous extrusion molding product according to claim 1, wherein the main moving member also has a shape variable plate portion in which a mold portion advances and retreats with respect to the resin material outlet. Concerning.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.
FIG. 1 is a cross-sectional view of an essential part showing an embodiment of the apparatus of the present invention, FIG. 2 is a cross-sectional view showing a state in which a main driving member of the apparatus is advanced, and FIG. 3 is a back surface showing a driven groove part of the shape-variable plate FIG. 4 is a sectional view of an essential part showing another embodiment of the present invention, FIG. 5 is a sectional view showing a state in which the main driving member is advanced, and FIG. FIG. 7 is a sectional view showing a state in which the main drive member has been advanced, and FIG. 8 is a partial perspective view showing each example of an extruded product manufactured by the apparatus of the present invention. .
[0008]
The present invention relates to an apparatus for manufacturing a continuous extrusion molded article whose cross-sectional shape changes as described in the section of the prior art, and in particular, a molded article having a plurality of changed portions, for example, as shown in each drawing of FIG. The present invention relates to an apparatus for obtaining a molded product.
Extrusions 20A, 20B, and 20C shown in FIG. 8 are all the above-described automotive moldings, and the molding 20A of (8A) has the widths w1 and w2 of the main body portion 21A equally on both sides in the longitudinal direction. It changes (in the embodiment, the height of the protrusion 22A also changes), and is manufactured by the apparatus 30 of FIGS. Similarly, the molding 20B of (8B) has a width w3, w4 of the main body portion 21B that varies unevenly on both sides in the longitudinal direction, and is manufactured by the device 60 of FIGS. 4 and 5, and the molding 20C of (8C). The width w5, w6 of the main body portion 21C changes on both sides in the longitudinal direction, and the heights h1, h2 change in the longitudinal direction, and are manufactured by the apparatus 90 of FIGS.
[0009]
First, the device 30 shown in FIGS. 1 and 2 will be described.
As described above, the apparatus 30 has the shape variable plates 41 and 42 having the mold parts 43 and 44 at the front end portions thereof facing the resin material outlet 31 of the extrusion device, and the shape variable plate is extruded together with the extrusion of the resin material. This is an apparatus for continuously extruding an extruded product 20A having a cross-sectional shape that is advanced and retracted 41 and 42. ,
In addition, this apparatus 30 is applied with respect to the well-known extruder which is not shown in figure. Although not described in detail, this embodiment is particularly a composite extrusion molding in which a plurality of different types or colors of resin materials are integrally and continuously extruded. As shown in the figure, this extrusion molding is often performed integrally with a metal foil strip P or a core wire for shape retention or prevention of shrinkage.
[0010]
In the apparatus 30 of FIG. 1, the shape variable plates 41 and 44 of the shape variable plates 41 and 42 move forward and backward with respect to the resin material outlet 31 while drawing a predetermined change trajectory. Respective sliding grooves 33, 34 for 41, 42 are formed. In the example shown in the figure, since each of the shape variable plates 41 and 42 is advanced and retracted in the horizontal direction, the sliding grooves 33 and 34 are also formed horizontally, but the change locus of the mold parts 43 and 44 is inclined. If the shape is a circular shape or a circular arc shape, the corresponding groove shape may be used.
[0011]
Driven groove portions 45 and 46 are formed in the main body portions of the variable shape plates 41 and 42 slidably attached to the slide grooves 33 and 34, respectively. As can be seen from FIG. 3, the driven groove portions 45 and 46 are slidably in contact with the operation shafts 51 and 52 of the main drive member 50 described below to move the variable shape plates 41 and 42 through the groove portions. In this case, the sliding grooves 33 and 34 are formed so as to intersect with each other. If the groove walls of the driven groove portions 45 and 46 are slightly curved as shown in FIG. 3, the movement can be smoothly performed.
[0012]
In the vicinity of the resin material outlet 31 of the extrusion device 30, a main driving member 50 connected to a driving member (not shown) is disposed so as to be able to advance and retreat with respect to the outlet 31. The driving member may be a conventionally used cylinder device.
The main driving member 50 is integrally provided with operating shafts 51 and 52 that are in sliding contact with the driven groove portions 45 and 46 of the shape variable plates 41 and 42 described above. In particular, these operating shafts 51 and 52 are provided at a predetermined angle with respect to the sliding grooves 33 and 34 so that the respective shape variable plates 41 and 42 slide in a predetermined manner in accordance with the advance and retreat of the main driving member 50. It is done.
[0013]
That is, the movement of the shape variable plates 41 and 42 is caused by the moving speed of the operating shafts 51 and 52 slidably contacting the driven groove portions 45 and 46, the inclination direction and the inclination angle of the operating shafts 51 and 52 and the sliding grooves 33 and 34. Determined by.
Needless to say, when the moving speeds of the operating shafts 51 and 52 are quickly performed, the variable shape plates 41 and 42 are quickly moved as compared with the case where the moving shafts 51 and 52 are slowly moved.
It is also clear that the operating shaft 51, 52 is on the forward side or the backward side with respect to the resin material outlet 31 depending on the direction of inclination relative to the sliding grooves 33, 34.
Furthermore, if the inclination angle of the operating shafts 51 and 52 with respect to the sliding grooves 33 and 34 is increased, the movement shaft moves greatly with a slight movement, and if the inclination angle with respect to the sliding grooves 33 and 34 is close to a right angle, the movement amount is reduced. Become.
[0014]
The moving speed of the operating shafts 51 and 52 (that is, the speed of the main driving member 50), the inclination direction and the inclination angle with respect to the operating shafts 51 and 52 and the sliding grooves 33 and 34 are determined in advance for the extruded product 20A. It is determined corresponding to the change in the cross-sectional shape. As shown in (8A) of FIG. 8, the extruded product 20A formed by the apparatus 30 shown in FIGS. 1 and 2 is such that the widths w1 and w2 of the main body 21A change evenly on both sides in the longitudinal direction. Therefore, the inclination directions of the operating shafts 51 and 52 with respect to the sliding grooves 33 and 34 are arranged symmetrically so as to advance and retreat at the same time with respect to the resin material outlet 31, and the operating shafts 51 and 52 move at the same speed at the same movement. The inclination angles d1 and d2 with respect to the sliding grooves 33 and 34 are configured to be the same in a symmetric state so as to be an amount.
[0015]
FIG. 2 shows a state where the main driving member 50 shown in FIG. Normally, stoppers are provided at the maximum forward position and the backward limit position of the main driving member 50. In this embodiment, the front end step 56 and the rear end step 57 of the moving recess 55 of the main driving member 50 including the operation shafts 51 and 52 are provided. Has a stopper function.
In this example, the protrusion 22A of the extrusion-molded product 20A changes the sectional height of the protrusion 22A by the protrusion shape variable plate 35 that is advanced and retracted by a drive device (not shown) separate from the main driving member 50. It is like that. Reference numeral 36 denotes a mold part at the front end of the protruding shape variable plate 35.
Reference numerals 37, 38 and 39 denote resin material escape openings, and when the portion of the resin material outlet 31 is shielded by the advancement of the shape-variable plates 41, 42 and 35, the surplus resin material which becomes redundant due to shielding. It is a discharge port for discharging to the outside. As shown in the figure, the opening areas of these relief openings 37, 38, 39 change in accordance with the advance and retreat of the shape variable plates 41, 42.
[0016]
The apparatus 60 shown in FIGS. 4 and 5 forms the extruded product 20B shown in FIG. 8 (8B), and the widths w3 and w4 of the main body portion 21B change unevenly on both sides in the longitudinal direction. To do. In this case, the advancing and retracting speeds of the shape variable plates 71 and 72 having the mold parts 73 and 74 that restrict the changing parts on both sides of the extruded product 20B with respect to the resin material outlet 61 are different.
[0017]
In such a case, as can be understood from the above description, the operating shafts 81 and 82 of the main driving member 80 that operates the variable shape plates 71 and 72 and the variable shape plates 71 and 72 slide. The inclination angles d3 and d4 with the respective sliding grooves 63 and 64 may be changed. That is, as shown in FIG. 4, the inclination angle d3 of the operating shaft 81 with respect to the sliding groove 63 is smaller than the inclination angle d4 of the operating shaft 82 with respect to the sliding groove 64 (close to a right angle). Therefore, even when the operating shaft 81 and the operating shaft 82 are moved by the same distance by the main driving member 80, the moving distance of the shape variable plate 71 moved by the operating shaft 81 is variable by the shape moved by the operating shaft 82. Less than that of plate 72. Thereby, the widths w3 and w4 on both sides in the longitudinal direction of the molded product 20B can be changed unevenly.
[0018]
FIG. 5 shows a state in which the main driving member 80 in the state shown in FIG. 4 and 5, reference numeral 65 denotes an upper shape variable plate. However, since the device 60 is fixed in its advanced state, the mold portion 66 functions as a fixed mold portion.
Reference numerals 75 and 76 are driven groove portions of the variable shape plates 71 and 72 with which the operating shafts 81 and 82 are slidably contacted, 85 is a concave portion for movement of the main driving member 80, 86 and 87 are stopper steps thereof, and 67 and 68 are excess resin. It is an escape port. 4 and 5 is the same as that described with reference to FIGS. 1 to 3.
[0019]
Further, the apparatus 90 shown in FIGS. 6 and 7 forms the extruded product 20C shown in (8C) of FIG. 8, and the widths w5 and w6 of the main body portion 21C change on both sides in the longitudinal direction. The heights h1 and h2 also change in the longitudinal direction. In the apparatus 90 of this example, the shape variable plates 101, 102, and 120 move back and forth with respect to the resin material outlet 91 of the apparatus so that the cross-sectional shapes of the left and right sides and the lower side of the extruded product 20C change. Among these, the shape variable plate 120 is a shape variable plate portion integrally formed as a part of the main driving member 110, and is directly advanced and retracted by the movement of the main driving member 110.
[0020]
That is, as the main moving member 110 advances and retreats, the mold 121 at the front end of the shape variable plate (part) 120 advances and retreats to the resin material outlet 91 by the amount of movement of the main moving member 120, and the cross-sectional shape of the corresponding part of the extruded product 20C is changed. Change.
At the same time, the operating shafts 111 and 112 formed integrally with the main driving member 110 are brought into sliding contact with the driven groove portions 105 and 106 of the variable shape plates 101 and 102 by the same action as described above, and the variable shape plate 101. , 102 are moved forward and backward with respect to the resin material outlet 91 by a predetermined amount of movement by the sliding grooves 93 and 94, respectively, and the cross-sectional shape of the corresponding part of the extruded product 20C is changed by the mold parts 103 and 104 at the front ends thereof. .
[0021]
FIG. 7 shows a state in which the main driving member 110 of FIG. In this example, reference numeral 95 denotes an upper shape variable plate, but this device 60 is fixed at the retreat limit position and is not involved in molding at all.
In the figure, reference numeral 115 denotes a moving recess of the main driving member 110, 116 and 117 are stopper steps thereof, and 119 is a notch for releasing excess resin provided in the main driving member 110. It matches with the formed escape port 97.
6 and 7 is the same as that described with reference to FIGS. 1 to 5, and therefore the details are omitted.
[0022]
【The invention's effect】
As illustrated and described above, according to the device of the present invention, when changing the cross-sectional shape of the extruded product by the advancement and retraction of the plurality of shape variable plates, the plurality of shape change plates are interlocked with the advancement and retraction of the main drive member, Since the variable shape plate is made to slide at the same time and corresponding to each change trajectory, compared to the conventional shape variable plate provided with each drive device, It became extremely advantageous in terms of equipment and cost. In particular, it can be installed in a small space of the extrusion apparatus, and the apparatus can be simplified.
[0023]
Further, conventionally, complicated and difficult control such as a program for operating the driving device and timing adjustment between the variable shape plates has been required. However, according to the device of the present invention, these problems are greatly reduced. The quality of the molded product can be improved and the production efficiency can be increased.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view of an essential part showing an embodiment of an apparatus of the present invention.
2 is a cross-sectional view showing a state in which a main drive member of the apparatus of FIG. 1 is advanced. FIG.
3 is a partial perspective view of a back surface side showing a driven groove portion of the shape-variable plate in FIG. 1; FIG.
FIG. 4 is a cross-sectional view of an essential part showing another embodiment of the present invention.
5 is a cross-sectional view showing a state in which a main driving member of FIG. 4 is advanced. FIG.
FIG. 6 is a cross-sectional view of an essential part showing an embodiment of the invention of claim 2;
7 is a cross-sectional view showing a state in which the main drive member of FIG. 6 is advanced. FIG.
FIG. 8 is a partial perspective view showing each example of an extrusion-molded product manufactured by the apparatus of the present invention.
FIG. 9 is a plan view showing a side protection molding for an automobile body.
FIG. 10 is a perspective view showing a side protection molding for an automobile door.
FIG. 11 is a front view showing an outline of a conventional extrusion-molded product manufacturing apparatus.
[Explanation of symbols]
20A, 20B, 20C Continuous extrusion molded product 30 Manufacturing device 31 of continuous extrusion molded product Resin material outlet 33, 34 Sliding groove 41, 42 Shape change plate 43, 44 Mold part 45, 46 Driven groove part 50 Driving member 51, 52 Operation Shaft 60 Continuous extrusion molded product manufacturing apparatus 61 Resin material outlet 63, 64 Sliding groove 71, 72 Shape change plate 73, 74 Mold part 75, 76 Driven groove part 80 Main driving member 81, 82 Operating shaft 90 Manufacturing of continuous extrusion molded product Device 91 Resin material outlet 93, 94 Sliding groove 101, 102 Shape change plate 103, 104 Mold portion 105, 106 Drive groove portion 110 Driving member 111, 112 Actuation shaft 120, shape change plate portion

Claims (2)

At least two or more shape-variable plates having a mold part at the front end face the resin material outlet of the extrusion device, and the shape-variable plate is advanced and retracted along with the extrusion of the resin material, thereby continuously producing an extruded product whose cross-sectional shape changes. For automatically extruding, comprising:
Respective sliding grooves for the shape variable plates are formed so that the mold portions of the shape variable plates advance and retreat with a predetermined change locus with respect to the resin material outlet of the extrusion device. ,
A follower groove is formed in each main body of the shape variable plate,
In the vicinity of the resin material outlet of the extrusion device, a main driving member connected to a driving member is disposed so as to be able to advance and retreat with respect to the outlet, and the main driving member is in sliding contact with the driven groove portion of each shape variable plate. A cross-sectional shape characterized in that each operating shaft is integrally provided with a predetermined angle with respect to the sliding groove so that each shape variable plate slides in a predetermined manner in accordance with the advancement and retraction of the main driving member. Manufacturing equipment for continuous extrusion products that change. The continuous extrusion molded article manufacturing apparatus according to claim 1, wherein the main driving member also has a shape variable plate portion in which a mold portion advances and retreats with respect to the resin material outlet.

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