CN1915643B - Forming Machine - Google Patents

Abstract

A forming machine is composed of the first and the second moulds which can be opened or closed, and the first and the second shearing parts which can be engaged aft the first and the second moulds are closed for forming a product while removing excessive material.

Description

Forming Machine

technical field

The invention relates to a forming machine for forming molded parts from sheet material.

Background technique

For example, Japanese Patent Publication No. 2002-144413 discloses a method for manufacturing molded parts. In this known method, the sheet is placed between upper and lower dies of the forming machine. Thereafter, the upper die is lowered toward the lower die by a predetermined distance, so that punches connected to the upper die cooperate with corresponding die grooves defined in the lower die (ie, extrusion molding step). As a result, the sheet is extruded to form a molded material. The upper mold is then further lowered towards the lower mold such that a heated cutting blade attached to the upper mold contacts the perimeter of the molding material (ie, the trimming step). As a result, the molding material is cut or trimmed circumferentially by the heat of the cutting blade, thereby removing waste material therefrom. In this way, a molded article is produced.

According to this known method, the cutting step and the extrusion molding step can be carried out substantially simultaneously in the molding machine. That is, the cutting step can be performed at the forming machine without using a specific cutting machine.

Contents of the invention

It is therefore an object of the present invention to provide an improved machine for the manufacture of molded parts.

In one embodiment of the invention, the forming machine comprises: a first mold and a second mold arranged and configured to be closable and openable; and a first cutting element and a second cutting element arranged and configured to The first mold and the second mold are engaged with each other after closing. When the first mold and the second mold are closed, the resin-based material is pressed to form a molding material. The molding material is trimmed circumferentially when the first trimming element and the second trimming element engage each other, thereby producing a molding and a scrap strip.

According to the invention, molding material is trimmed in the circumferential direction by a first trimming element and a second trimming element arranged in a molding machine, thereby producing a molded part. That is, the molding machine includes a trimming mechanism that trims molding material to produce molded parts. Therefore, no additional or special cutting machine is required to cut the molded material. Therefore, moldings can be produced efficiently or quickly. This reduces the manufacturing costs of the molded part.

Other objects, features and advantages of the present invention can be easily understood through the following detailed description and claims with reference to the accompanying drawings.

Description of drawings

1 is a side sectional view of a molding machine according to an exemplary embodiment of the present invention;

Fig. 2 is an enlarged lateral cross-sectional view of the upper and lower die units of the forming machine, showing the state when the plate is fed between the upper and lower dies of the upper and lower die unit;

Fig. 3 is an enlarged side sectional view of the upper and lower mold units, showing the state when a sheet material is extruded to form a molding material;

Fig. 4 is an enlarged side sectional view of the upper and lower mold units, showing the state when the molding material is cut or trimmed to form moldings and scrap strips;

Figure 5 is an enlarged side sectional view of the upper and lower mold units, showing the state when the upper and lower molds are opened again to hold the molding; and

Fig. 6 is an enlarged side sectional view of the upper and lower mold units, showing the state when the molding and the scrap strip are released from the upper and lower molds.

Detailed ways

Typical examples of the present invention will be described in detail below with reference to the accompanying drawings. The following detailed description is only for those skilled in the art to further understand the preferred aspects of the present invention, and is not intended to limit the scope of the present invention. Only the claims are intended to define the scope of the invention. Therefore, the combinations of features and steps disclosed in the detailed description are not necessary to practice the invention in the broadest sense, but are merely illustrative of typical examples of the invention. In addition, various features in the specification can be combined in various ways (not listed here) to obtain additional useful embodiments of the present invention.

1 to 6 illustrate exemplary embodiments of the present invention.

The forming machine 1 is used to extrude a sheet S' (Figs. 1 and 2) to form a molding material S (Fig. 3), which is then trimmed to produce moldings Sa and scrap strips Sb (Figs. 4-6 ). Furthermore, the sheet S' is preferably a resin-based sheet.

As shown in FIG. 1 , the forming machine 1 may comprise an upper frame (first lateral frame) 10 and a lower frame (second lateral frame) 20 interconnected by vertical support elements 30 . In addition, the molding machine 1 further includes: an upper mold unit (first mold unit) 2 connected to the upper frame 10 ; and a lower mold unit (second mold unit) 3 connected to the lower frame 20 .

The upper mold unit 2 is mainly composed of an upper base (first base) 12 and an upper mold (first mold) 13 having an upper molding surface 13a corresponding to the molding Sa. The upper base 12 has an annular wall 11 and a downwardly directed groove 12 a defined in the annular wall 11 . The upper base member 12 constructed above is connected to the upper frame 10 through a plurality of (for example two) vertical connecting members 15 . The upper die 13 is housed in the groove 12 a of the upper base 12 so as to be vertically movable. Furthermore, the upper mold unit 2 includes a plurality of (for example two) hydraulic cylinders 14 which are vertically connected to the upper frame 10 . Each hydraulic cylinder 14 has a piston rod 14 a vertically movably received in a through hole (not shown) in the base member 12 . Obviously, the piston rod 14a penetrates the base member 12 downwards and is connected to the upper mold 13 . Furthermore, it is preferable that the hydraulic cylinder 14 is arranged and constituted such that a gap of a distance L1 is generally formed between the upper base member 12 and the upper die 13 (eg, FIG. 2 ).

The lower mold unit 3 is mainly composed of a lower base (second base) 22 and a lower mold (second mold) 23 having a lower molding surface 23a corresponding to the molding Sa. The lower mold 23 is placed on the lower base 22 . Furthermore, the second mold unit 3 includes a driving hydraulic cylinder 24 which is vertically arranged and fixed on the lower frame 20 . The hydraulic cylinder 24 has a piston rod 24a extending upward therefrom. The piston rod 24a is connected to the lower base 22 so that the lower base 22 can be moved vertically. It can be understood that when the hydraulic cylinder 24 is actuated, the lower base 22 moves vertically toward and away from the upper base 12 through the piston rod 24a, so that the upper and lower molds 13 and 23 can be closed and opened, wherein the upper and lower molds 13 and 23 are connected with upper and lower base parts 12 and 22 respectively.

The upper mold unit 2 also includes an annular upper cutting blade 17 (ie, a first cutting element), which is connected to the upper base member 12 so as to be movably connected to the upper mold 13 . The upper trimming blade 17 is used to trim the molding material S in the circumferential direction, thereby producing moldings Sa and scrap strips Sb. Preferably, the upper cutting blade 17 is disposed in the groove 12 a of the upper base 12 to extend around the upper die 13 . The upper die unit 2 also includes a plurality (eg two) of upper cutting blades 18 (ie first cutting elements), of which the one shown in the figure is connected to the upper base member 12 . The upper cutting blade 18 is used to cut off the scrap strip Sb. Preferably, the upper cutting blades 18 are positioned around the upper die 13 so as to be spaced apart from each other by a predetermined interval.

Similarly, the lower mold unit 3 also includes an annular lower cutting blade 27 (ie, a second cutting element), which is connected to the lower mold 23 . The lower cutter blade 27 is arranged and constructed such that it engages with the upper cutter blade 17 when the lower base member 22 moves further toward the upper base member 12 after the upper and lower molds 13 and 23 are closed. Preferably, the lower cutting blade 27 may be fitted on the lower die 23 so as to extend along the upper periphery of the lower die 23 . The lower mold unit 3 also includes a plurality of (for example two) lower cutting blades 28 (ie, second cutting elements), of which the one shown in the figure is connected to the lower base member 22 . The lower cutting blade 28 is arranged and constructed such that it engages with the upper cutting blade 18 when the lower base 22 moves further toward the upper base 12 after the upper and lower molds 13 and 23 are closed. That is, the lower cutting blade 28 is preferably positioned around the lower die 23 to correspond to the upper cutting blade 18 .

The upper mold unit 2 includes a plurality of (for example, two) suction pumps 16 (ie, suction means), which are connected to the upper base member 12 . Each suction pump 16 includes: a suction pipe 16 a penetrating downward through the annular wall 11 of the upper base 12 ; and a suction port 16 b opening on the end surface of the annular wall 11 .

Conversely, the lower mold unit 3 comprises a plurality (for example two) of elongated block supports 26 for supporting the periphery of the sheet S'. Preferably, each support 26 is positioned next to a lower cutting blade 27 connected to the lower die 23 . Therefore, the above-mentioned positioned support member 26 is vertically movably connected to the lower base member 22 via a support shaft 26a having an elastic member 26b (such as a spring, rubber or the like) and an adjustment nut 26c. That is, the support member 26 is connected to a support shaft 26 a inserted into a through hole (not shown) formed in the lower base member 22 . The elastic member 26b is interposed between the support member 26 and the lower base member 22, thereby generally urging the support member 26 upward. In addition, the elastic member 26b is preferably adjusted by adjusting the nut 26c so that a gap of a distance L2 is generally formed between the support member 26 and the lower base member 22 (eg, FIG. 2 ). Preferably, the elastic member 26b is adjusted such that the upper surface of the support member 26 is coplanar with the lower molding surface 23a of the lower mold 23 .

Preferably, the supports 26 may be arranged such that they are respectively aligned with the suction ports 16b of the suction pump 16 in the vertical direction. Therefore, when the upper and lower dies 13 and 23 are closed, the periphery of the sheet S' is supported from the lower side by the support member 26 and suction is applied by the suction pump 16 from the upper side. Therefore, when the upper and lower dies 13 and 23 are closed, the periphery of the sheet material S' can be positioned approximately horizontally and reliably supported. As a result, the sheet material S' can be extruded smoothly without wrinkling, thereby producing a wrinkle-free molding material S (wrinkle-free molding Sa).

Generally, each of the upper and lower molds 13 and 23 preferably has a cooling mechanism (not shown), such as a pipe for supplying a cooling liquid such as water or air.

A typical method of manufacturing the molded article Sa using this molding machine 1 will be described below.

First, as shown in FIG. 2, the sheet material S' is fed into the space between the upper and lower dies 13 and 23 by a conveying device (not shown). It can be understood that the outer dimension of the plate S′ is larger than the outer dimension of the lower molding surface 23 a of the lower mold 23 . Then, the fed sheet material S' is placed on the lower die 23 such that its periphery protrudes outward from the lower molding surface 23a of the lower die 23 . Thus, the sheet material S' is arranged on the lower die 23 so that its periphery is supported by the supporting member 26 .

Thereafter, the hydraulic cylinder 24 is actuated so that the lower base 22 moves upwards towards the upper base 12 . As a result, as shown in FIG. 3, the upper and lower dies 13 and 23 (which are connected to the upper and lower base members 12 and 22, respectively) are closed, whereby the sheet material S' is extruded to form a molding material S. As shown in FIG. At this time, the periphery of the molding material S is securely held between the annular wall 11 of the upper base 12 and the support 26 of the lower mold unit 3 . At the same time, the suction pump 16 of the upper mold unit 2 is actuated so that the periphery of the molding material S is pulled toward the end surface of the annular wall 11 of the upper base 12 by the suction force of the suction pump 16 . Thus, the periphery of the sheet S' is reliably supported. Therefore, the sheet material S' can be molded into the molding material S without wrinkling. Furthermore, when the upper and lower dies 13 and 23 are closed, the hydraulic cylinder 14 of the upper die unit 2 is preferably actuated so that the gap formed between the upper base 12 and the upper die 13 at a distance L1 can be maintained.

Subsequently, the hydraulic cylinder 14 of the upper die unit 2 is no longer actuated, but the hydraulic cylinder 24 is continuously actuated. As a result, as shown in FIG. 4 , the lower base 22 is further moved upward toward the upper base 12 by the hydraulic cylinder 24, so that the closed upper and lower molds 13 and 23 are pushed together with the molding material S to the upper base 12. In the groove 12a, until the gap formed between the upper base member 12 and the upper mold 13 is eliminated (that is, until the upper mold 13 reaches the highest position in the groove 12a of the upper base member 12). As shown in Figure 4, at this time, the lower cutting blade 27 of the lower mold unit 3 is engaged with the upper cutting blade 17 of the upper mold unit 2, so that the molding material S is cut along the circumferential direction, and then the molded parts Sa and Waste strip Sb. Simultaneously, the lower cutting blade 28 of the lower die unit 3 is engaged with the upper cutting blade 18 of the upper die unit 2, thereby cutting the scrap strip Sb. It can be appreciated that when the lower base 22 moves upward toward the upper base 12, since the annular wall 11 of the upper base 12 prevents the support 26 from moving upward, the lower mold unit 3 is pushed downward relative to the upper and lower molds 12 and 23. Support 26. Thus, the distance L2 of the gap formed between each support member 26 and the lower base member 22 is reduced to a distance L3 (equal to L2 minus L1 ). Therefore, when the molding material S is trimmed, the periphery of the molding material S can be reliably held between the annular wall 11 of the upper base 12 and the support 26 of the lower mold unit 3 . Therefore, the molding material S can be cut without wrinkling. As a result, the molded part Sa is produced with a wrinkle-free appearance.

Then, the hydraulic cylinder 24 is no longer actuated, so that the lower base 22 is lowered. As a result, as shown in FIG. 5, the upper and lower molds 13 and 23 were opened again. As shown in FIG. 5 , at this time, since the hydraulic cylinder 14 of the upper die unit 2 is still not actuated, the upper die 13 remains at the highest position in the groove 12 a of the upper base member 12 . Accordingly, the molding Sa is held on the upper die 13 by the frictional force between the molding Sa and the upper cutting blade 17 . Conversely, the scrap strip Sb is held on the end face of the annular wall 11 of the upper base 12 by the suction force of the suction pump 16 .

Thereafter, the hydraulic cylinder 14 of the upper mold unit 2 is actuated again to move the upper mold 13 downward, thereby forming a gap of a distance L1 between the upper base member 12 and the upper mold 13 again. As a result, as shown in FIG. 6, the molding Sa held on the upper mold 13 is released therefrom. Then, the suction pump 16 of the upper mold unit 2 is no longer activated, so that the cut waste strip Sb is released from the end face of the annular wall 11 of the upper base 12 . Thus, such a molding machine 1 can be used to manufacture a molded article Sa.

When the shaping of the molding Sa is completed, the manufacturing process can be repeated in the same manner as described above.

Various modifications and variations may be made to the exemplary embodiment without departing from the scope of the present invention. For example, in this embodiment, the lower base member 22 of the exemplary embodiment is moved upwardly by a hydraulic cylinder 24 . However, the upper base 12 can be moved downward by the hydraulic cylinder 24 if desired.

Claims (5)

1. A molding machine, comprising: a first mold and a second mold arranged and constructed to be closable and openable; and a first tailoring element and a second tailoring element arranged and configured to engage each other after the first and second molds are closed, wherein the first die is arranged and configured to move relative to the first trimming element after the first die and the second die are closed; when the first die and the second die are closed, the resin-based sheet is pressed, thereby forming a molding material; and when the first die is moved relative to the first cutting element together with the second die, the first cutting element and the second cutting element engage each other, thereby cutting the molding material circumferentially, thereby producing molded part and waste strip; and, the first cutting element is connected with the first mold and is arranged and constituted so that: when the first mold and the second mold are opened, the molded part produced is held by the first cutting element in The molded part produced is released from the first mold while the first mold moves downward. 2. The molding machine of claim 1, further comprising a first cutting element and a second cutting element arranged and configured to engage each other after the first and second molds are closed; wherein when the first cutting element and The strip of waste is cut when the second cutting elements engage each other. 3. The molding machine according to claim 1, further comprising a suction device arranged and constructed to hold the periphery of the molding material by its suction force. 4. The molding machine of claim 3, further comprising a support element arranged and configured to support the periphery of the molding material, wherein the support element is aligned with the suction means. 5. A forming machine, comprising: the first element; a second base arranged and configured to move towards and away from the first base; a first mold movably connected to the first base; a second mold connected to the second base; a first tailoring element attached to the first base; and a second tailoring element attached to the second die; Wherein, the first mold is arranged and constructed to move relative to the first tailoring element after the first mold and the second mold are closed; when the second base member moves towards the first base member, the first mold and the second mold close , thereby extruding the sheet material to form the molded material; and when the second base member moves further toward the first base member, the first die together with the second die moves relative to the first tailoring element so that the first tailoring element and the second cutting element are engaged with each other, thereby cutting the molding material circumferentially to produce moldings and scrap strips; and, the first cutting element is connected to the first mold and is arranged and constructed such that: The resulting molded part is held on the first mold by the first trimming element while the second mold is open, while the resulting molded part is released from the first mold as the first mold moves downward.

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