Improved cold and hot press forming system

Abstract

The improved disc type cold and hot press forming system is characterized in that the hot press forming procedure in the hot zone working station is carried out in a vacuum environment to reduce the amount of heat energy dissipated through conduction.

Description

TECHNICAL FIELD

[0001] The present invention relates to polymer processing technology, and in particular, to an improved disc-type hot and cold press molding system. BACKGROUND

[0002] In order to improve the manufacturing efficiency of polymer processing and reduce the physical burden of workers, a disc-type carrying technology is used to move molds between different workstations in the Taiwan Patent No. M571302, which replaces the traditional hot press molding or cooling and shaping process performed by workers at different workstations.

[0003] Although the technology disclosed in the prior art can greatly reduce the physical burden of workers, it is not perfect and still has room for improvement. SUMMARY

[0004] The main purpose of the present invention is to provide an improved disc-type hot and cold press molding system that can effectively utilize resources and avoid waste.

[0005] Therefore, in order to achieve the above purpose, the improved disc-type hot and cold press molding system provided by the present invention uses a known disc-type mold conveying and processing mechanism to sequentially displace molds between a hot zone workstation, a cold zone workstation, and a cleaning workstation, so that the foamed polymer embryo placed in the mold is shaped by heat and pressure in the hot zone workstation, then cooled and shaped into a finished product in the cold zone workstation, and then moved to the cleaning workstation to remove the finished product and clean the mold. The main technical feature of the present invention is that the hot press molding process performed in the hot zone workstation is carried out in a vacuum environment isolated from the atmosphere to reduce the amount of heat energy dissipated through conduction.

[0006] In terms of technical content, the improved disc-type hot and cold press molding system includes a moving mechanism comprising the disc-type mold conveying and processing mechanism, at least one first vertical mold clamping mechanism arranged at a fixed position corresponding to the hot zone workstation, and at least one second vertical mold clamping mechanism arranged at another fixed position corresponding to the cold zone workstation.

[0007] The first vertical mold clamping mechanism includes a first hollow cover, a first heating unit, and a vacuum unit.

[0008] The first hollow cover is a hollow object with a bottom end that is transparent to air, and can reciprocally displace between a first open position above and a first closed position below along the direction of gravity. When in the first closed position, the bottom end airtightly abuts a rotating disc of the moving mechanism, so that the internal space of the first hollow cover is defined as a first working space isolated from the atmosphere.

[0009] The first heating unit is capable of supplying heat energy to the mold located in the first space, so as to provide the heat energy required for the hot-pressing molding process.

[0010] When the mold performs the hot-pressing molding process in the first working space, the vacuum unit evacuates the gas in the first working space to form a vacuum in the first working space, so as to reduce the waste of heat energy provided by the first heating unit due to heat conduction to the gas.

[0011] The first heating unit is located in the internal space of the first hollow cover, and when the first hollow cover is located in the first closed position, the first heating unit is located in the first working space.

[0012] The rotating disc is annular, and the first vertical mold clamping mechanism has a frame portion, and the frame portion is vertically arranged on the inner side of the inner ring side and the outer side of the outer ring side of the rotating disc, and the first hollow cover is movably arranged on the frame portion between the first closed position and the first open position.

[0013] The movement of the first hollow cover between the first closed position and the first open position is a linear reciprocating motion.

[0014] The frame portion includes a plurality of columns vertically arranged on the inner side of the inner ring side and the outer side of the outer ring side of the rotating disc, a top seat bridged to the top ends of the columns and located above the rotating disc, and a columnar top piece protruding below the top seat, and the first hollow cover is sleeved and slidably arranged on the top piece.

[0015] The vacuum unit has a hollow first gas pipe, and the pipe axis is parallel to the top piece column axis and fixed to the top seat, and in sliding connection with the first hollow cover, and the bottom end pipe opening is in communication with the internal space of the first hollow cover, so that the first gas pipe provides guided displacement to avoid deviation of the first hollow cover during sliding movement of the first hollow cover, and when the first hollow cover is located in the first closed position, the first gas pipe provides a gas flow channel for evacuating the gas in the first working space. That is, the first gas pipe has the functions of guide rail and airway.

[0016] Similarly, the first heating unit further includes a hollow first wire pipe, and the pipe axis is parallel to the top piece and fixed to the top seat, and in sliding connection with the first hollow cover, and the bottom end pipe opening is in communication with the internal space of the first hollow cover, so that the first wire pipe provides the extension of the heating wire through the pipe hole space, and can provide guidance for the movement of the first hollow cover.

[0017] Further, the first vertical mold clamping mechanism further comprises a second hollow cover with a top opening, which is located below the rotary disc and is slidably arranged on the frame, and the top opening is correspondingly arranged with the bottom opening of the first hollow cover, and the second hollow cover is linearly displaced between a second closed position and a second open position, when the second hollow cover is located at the second closed position, the top opening of the second hollow cover is in airtight abutment with the rotary disc, and the internal space of the second hollow cover defines a second working space which is isolated from the atmosphere, when the second hollow cover is located at the second open position, the top of the second hollow cover is separated from the rotary disc.

[0018] Further, the moving mechanism further comprises at least one through hole which is arranged on the rotary disc and corresponds to the position of the mold, so that the lower part of the mold can communicate with the second working space through the through hole, and the area of the through hole is smaller than the area of the bottom opening of the first hollow cover, smaller than the area of the top opening of the second hollow cover, and smaller than the area of the orthographic projection of the mold.

[0019] Therefore, when the mold is located in the hot zone working station for hot pressing and forming, it is located between the first hollow cover and the second hollow cover, and during the processing, the first hollow cover and the second hollow cover are located at the first closed position and the second closed position respectively, so that the first working space and the second working space are connected with each other through the through hole and maintain the state of being isolated from the atmosphere.

[0020] Further, the first vertical mold clamping mechanism further comprises a second heating unit which can provide heat energy in the second working space. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are some embodiments of the present application, and those skilled in the art can also obtain other drawings according to these drawings without any creative labor.

[0022] Figure 1 It is a perspective view of a preferred embodiment of the present application.

[0023] Figure 2 It is a partial perspective view of the moving mechanism and a single first vertical mold clamping mechanism of a preferred embodiment of the present application.

[0024] Figure 3 It is a perspective view of the first vertical mold clamping mechanism of a preferred embodiment of the present application.

[0025] Figure 4is a partial exploded view of a first vertical clamping mechanism of a preferred embodiment of the present application.

[0026] Figure 5 is a cross-sectional view along Figure 2 the A-A section line of the first embodiment of the present application, wherein the first hollow cover is located at the first open position and the second hollow cover is located at the second open position.

[0027] Figure 6 is a cross-sectional view along Figure 2 the B-B section line of the first embodiment of the present application, wherein the first hollow cover is located at the first open position and the second hollow cover is located at the second open position.

[0028] Figure 7 is a cross-sectional view along Figure 2 the A-A section line of the first embodiment of the present application, wherein the first hollow cover is located at the first closed position and the second hollow cover is located at the second closed position.

[0029] Figure 8 is a cross-sectional view along Figure 2 the B-B section line of the first embodiment of the present application, wherein the first hollow cover is located at the first closed position and the second hollow cover is located at the second closed position.

[0030] wherein (10) is an improved cold and hot press forming system, (20) is a moving mechanism, (21) is a rotating disc, (22) is a perforation, (30) is a first vertical clamping mechanism, (31) is a frame, (311) is a base, (312) is a stand, (313) is a top seat, (314) is a top piece, (315) is an upper die seat, (316) is a bottom piece, (317) is a lower die seat, (32) is a first hollow cover, (321) is a first cover body, (322) is a first sliding hole, (323) is a second sliding hole, (324) is a third sliding hole, (33) is a second hollow cover, (331) is a second cover body, (332) is a first sliding hole, (333) is a second sliding hole, (334) is a third sliding hole, (34) is a first driving part, (35) is a second driving part, (36) is a first heating unit, (361) is a first wire tube, (37) is a second heating unit, (371) is a second wire tube, (38) is a vacuum unit, (381) is a first air tube, (382) is a second air tube, (40) is a second vertical clamping mechanism, and (50) is a mold. DETAILED DESCRIPTION

[0031] In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the following will be combined with the accompanying drawings for the embodiments of the present application to make a clear and complete description of the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative work belong to the scope of protection of the present application.

[0032] First, referring to Figure 1 As shown in the figure, the improved disc cold and hot press forming system (10) provided in a preferred embodiment of the present application mainly comprises a moving mechanism (20), a plurality of first vertical mold clamping mechanisms (30), a plurality of second vertical mold clamping mechanisms (40) and a plurality of molds (50).

[0033] As Figure 2 shown, the moving mechanism (20) is a known technology for moving the mold, which is composed of a rotatable turntable (21) in the form of a circular disc, a plurality of quadrilateral perforations (22) are equally angularly spaced apart and respectively provided on the turntable (21), wherein the number of the perforations (22) is determined according to the size of the turntable (21) and the number of preset workstations, for example, the number of five perforations shown in the figure corresponds to the number of five preset workstations, and the angle between each adjacent perforation is 72 degrees.

[0034] Each of the first vertical mold clamping mechanisms (30) and the second vertical mold clamping mechanisms (40) is sequentially and equally angularly spaced apart from the center of the turntable (21) and respectively provided at their respective fixed positions, and the turntable (21) is horizontally arranged in each of the first vertical mold clamping mechanisms (30) and the second vertical mold clamping mechanisms (40), and the position of each of the first vertical mold clamping mechanisms (30) is used as a hot zone workstation, and the position of each of the second vertical mold clamping mechanisms is used as a cold zone workstation.

[0035] As Figures 2 to 4As shown, each of the first vertical mold clamping mechanisms (30) has a frame (31) vertically arranged on the inner side of the inner ring side and the outer side of the outer ring side of the turntable (21), a first hollow cover (32) with a hollow bottom end located above the turntable (21) and sliding on the frame (31), and guided by the frame (31) to move up and down linearly between a first closed position and a first open position, a second hollow cover (33) with a hollow top end located below the turntable (21) and sliding on the frame (31), also guided by the frame (31) to move up and down linearly between a second closed position and a second open position, a first driving part (34) fixed on the frame (31) and providing power to the first hollow cover (32) to move between the first closed position and the first open position, a second driving part (35) fixed on the frame (31) and providing power to the second hollow cover (33) to move between the second closed position and the second open position, a first heating unit (36) arranged on the frame (31) and located in the first hollow cover (32), a second heating unit (37) arranged on the frame (31) and located in the second hollow cover (33), and a vacuum unit (38) capable of removing gas in a specific sealed space to form a vacuum.

[0036] The area of the first hollow cover (32) bottom end opening orthographic projection on the turntable (21), and the area of the second hollow cover (33) top end opening orthographic projection on the turntable (21), are both greater than the single hole area of each of the through holes (22), and when the turntable (21) moves to the working position, different through holes are respectively located directly below the bottom end opening of each first hollow cover (32) and directly above the top end opening of the second hollow cover (33).

[0037] When the first hollow cover (32) is driven by the first driving part (34) to move to the first closed position, the bottom end opening is in gas-tight contact with the upper side of the turntable (21), preventing gas from flowing between the interface between the first hollow cover (32) and the turntable (21), thereby defining the internal space of the first hollow cover (32) tightly connected to the turntable (21) as a first working space; on the contrary, when the second hollow cover (33) is driven by the second driving part (35) to move to the second closed position, the top end opening is in gas-tight contact with the lower side of the turntable (21), preventing gas from flowing between the interface between the second hollow cover (33) and the turntable (21), thereby defining the internal space of the second hollow cover (33) tightly connected to the turntable (21) as a second working space.

[0038] The second vertical mold clamping mechanism (40) is a known technology for providing mold clamping force to the mold. Its specific structure is not described here, but it is necessary to explain that, as shown in Figure 1 The first vertical mold clamping mechanism (30) and the second vertical mold clamping mechanism (40) are each provided in two, i.e., the number of hot zone workstations and the number of cold zone workstations are each two. The remaining one is a cleaning workstation for taking out the material, cleaning the mold, and placing the material.

[0039] The mold (50) is a known multi-layer mold technology formed by multiple mold pieces stacked on each other. It is used for molding and shaping the foamed polymer product. It is positioned and installed on the turntable (21) and placed on the corresponding through hole. It can sequentially perform hot pressing and shaping processing in each hot zone workstation, then enter each cold zone workstation for cooling and shaping, and then enter a cleaning workstation for taking out the molded product and cleaning the mold. After that, the foamed product is placed in the mold for the next cycle of hot pressing, cooling, and cleaning.

[0040] Through the above components, the improved disc type cold and hot pressing molding system (10) is implemented. The foamed polymer product is placed in the mold in the open mold state in the cleaning workstation by manual or mechanical means. The turntable (21) transports it to the working position in the adjacent hot zone workstation. The first hollow cover (32) and the second hollow cover (33) are displaced from the first open position and the second open position as shown in Figure 5 and Figure 6 to the first closed position and the second closed position as shown in Figure 7 and Figure 8 The first working space and the second working space are connected through the corresponding through hole and maintain an isolated state from the atmosphere, so that the mold in them is also isolated from the atmosphere.

[0041] Then, the vacuum unit (38) removes the gas in the first working space and the second working space that has been isolated from the atmosphere, making the space a vacuum. At the same time, the first heating unit (36) and the second heating unit (37) provide heat energy to the mold, and the first vertical mold clamping mechanism (30) provides mold clamping force to the mold. The foamed polymer product in the mold is subjected to heat energy and pressure to give it a specific shape. To achieve a better vacuum degree, the above air removal operation can be completed before the mold is completely closed, avoiding gas remaining in the mold after it is closed. In this way, in a vacuum environment, the heat energy provided by the heating unit can be avoided from being dissipated into the gas, reducing the waste of heat energy.

[0042] The foamed polymer molded article in the mold is subjected to repeated hot-pressing and shaping in the two-station hot-zone workstations, and then enters the two-station cold-zone workstations for cooling and setting. The cooling and setting and the subsequent cleaning process are not the technical features of the present application and are disclosed in the prior art, and thus will not be described further.

[0043] For further details, please refer to Figures 3 to 8 For further details, please refer to

[0044] The frame portion (31) has a base (311) located below the turntable (21), a plurality of columns (312) respectively erected on the base (311) and standing on the inner side of the inner ring and the outer side of the outer ring in the turntable (21), and parallel to each other, a plate-shaped top seat (313) bridged to the top ends of the columns (312) and located above the turntable (21) parallel to the turntable (21), a columnar top piece (314) protruding below the top seat (313) and allowing the first hollow cover (32) to be sleeved and connected on the top piece (314), an upper die seat (315) fixed to the bottom end of the top piece (314) and located in the first hollow cover (32), a columnar bottom piece (316) coaxially arranged below the turntable (21) and allowing the second hollow cover (33) to be sleeved and connected on the bottom piece (316), and a lower die seat (317) fixed to the top end of the bottom piece (316) and located in the second hollow cover (33). Therefore, the frame portion (31) can be displaced in a predetermined direction by using the columnar top piece (314) and bottom piece (316) as the guide mechanism of the first hollow cover (32) and the second hollow cover (33). The bottom piece (316) is filled with a fluid pressure cylinder.

[0045] The first hollow cover (32) and the second hollow cover (33) are similar in structure, but the directions of the through openings are opposite to each other. Specifically, each of the first hollow cover (32) and the second hollow cover (33) has a first cover body (321) and a second cover body (331) with one end being hollow and in the shape of a solid quadrangular shell. A first sliding hole (322) (332) is formed in the central position of the closed end wall of the cover body (321) (331) and is sleeved on the top piece (314) or the bottom piece (316). A plurality of second sliding holes (323) (333) and third sliding holes (324) (334) are formed in the closed end walls of the first cover body (321) and the second cover body (331), respectively, and are arranged on both sides of the first sliding hole (322) (332).

[0046] The first driving unit (34) and the second driving unit (35) are generally known driving techniques, such as the fluid pressure cylinders disclosed in the figures, which are respectively fixed on the top base (313) and the base (311) to provide the first cover body (321) and the second cover body (331) of the first hollow cover and the second hollow cover with the power required for sliding.

[0047] The first heating unit (36) has a plurality of hollow straight pipe-shaped first line pipes (361) which are respectively bridged on the top base (313) and the upper mold base (315) and pass through the third sliding hole (324) of the first hollow cover (32) and form openings on the upper mold base (315) and communicate the space above the top base (313) with the pipe hole space, and a plurality of heating pipes (not shown in the figure) are connected to the upper mold base (315) from the outside by passing through the first line pipes (361), so that heat energy can be transferred to the upper mold base (315).

[0048] The second heating unit (37) is similar in structure to the first heating unit (36), except for the difference in the spatial position and the attached objects. Specifically, the second line pipes (371) of the second heating unit (37) are fixed on the base (311) at one end and connected to the lower mold base (317) at the other end by passing through the third sliding hole (334) of the second hollow cover (33), to provide appropriate communication space so that heating pipes can pass through the second line pipes (371) from the outside to transfer heat energy to the lower mold base (317).

[0049] The vacuum unit (38) has a negative pressure device not shown in the figure. A plurality of first air pipes (381) are bridged between the top base (313) and the upper mold base (315) in a similar manner to the first line pipes, to provide a gas flow channel between the interior space of the first hollow cover (32) and the negative pressure device, and each first air pipe (381) extends in the second sliding hole (323) of the first hollow cover. A plurality of second air pipes (382) are respectively bridged between the base (311) and the lower mold base (317) in a similar manner to the second line pipes, and each passes through the second sliding hole (323) of the corresponding second hollow cover. Unlike the first air pipes (381), the second air pipes (382) do not exist for the purpose of providing a gas flow channel in this embodiment.

[0050] Through the above configuration, the first hollow cover (32) and the second hollow cover (33) can not only obtain the main guiding effect through the top piece (314) and the bottom piece (316), but also can obtain the auxiliary guiding effect of ensuring no deviation during movement through the first line pipe (361), the second line pipe (371), the first air pipe (381) and the second air pipe (382) which are slidably connected, so as to ensure the smooth reciprocating movement of the first hollow cover (32) and the second hollow cover (33).

[0051] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, but not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. An improved cold and hot press molding system with a rotating disc, comprising: a moving mechanism with a rotatable circular rotating disc; at least a first vertical mold clamping mechanism and at least a second vertical mold clamping mechanism arranged in a predetermined arc range with the center of the rotating disc as the center, and the rotating disc is arranged between the first vertical mold clamping mechanism and the second vertical mold clamping mechanism, and the first vertical mold clamping mechanism is used as a hot zone workstation, and the second vertical mold clamping mechanism is used as a cold zone workstation; at least one mold with two mold pieces, and at least one of the mold pieces is arranged on the rotating disc and can move between the hot zone workstation and the cold zone workstation with the rotation of the rotating disc; characterized in that: the first vertical mold clamping mechanism has a frame arranged on the inner side of the inner ring side and the outer side of the outer ring side of the rotating disc, a bottom-end hollow first hollow cover is movably arranged on the frame and located above the rotating disc, and can reciprocate between a first closed position and a first open position, when the first hollow cover is located at the first closed position, the bottom end is in air-tight contact with the rotating disc, and the internal space of the first hollow cover defines a first working space isolated from the atmosphere, when the first hollow cover is located at the first open position, the bottom end is separated from the rotating disc by a predetermined working distance, a first driving part provides the power required for the displacement of the first hollow cover, a first heating unit can provide heat energy in the first working space, and a vacuum unit can remove the gas in the first working space to form a vacuum in the first working space; when the mold pieces move to the hot zone workstation for hot pressing molding with the rotation of the rotating disc, the first hollow cover is first located at the first closed position, and then the gas in the first working space is removed by the vacuum unit before the mold pieces are overlapped into a closed mold state, and the first heating unit provides heat energy to the mold in the first working space; wherein the frame comprises a plurality of columns arranged on the inner side of the inner ring side and the outer side of the outer ring side of the rotating disc, a top seat is bridged to the top end of each column and located above the rotating disc, a columnar top piece protrudes below the top seat, and the first hollow cover is sleeved and slid on the top piece, and can reciprocate linearly on the top piece between the first open and the first closed positions; wherein the vacuum unit has a hollow first air pipe with a pipe axis parallel to the top piece column axis fixed on the top seat and in sliding connection with the first hollow cover, and the bottom end pipe opening is in communication with the internal space of the first hollow cover; wherein the first heating unit further comprises a hollow first wire pipe with a pipe axis parallel to the top piece fixed on the top seat and in sliding connection with the first hollow cover, and the bottom end pipe opening is in communication with the internal space of the first hollow cover.

2. The improved cold and hot press molding system according to claim 1, characterized in that: the frame further comprises an upper mold seat fixed on the bottom end of the top piece and located in the first hollow cover. ​ The vacuum unit has a negative pressure device and a connecting channel connecting the negative pressure device and the first working space.

3. The modified cold and hot press forming system of claim 2, wherein, The first hollow cover has a cover body with a bottom end being transparent, a first sliding hole is arranged in the top end of the cover body and coaxially slides with the top piece, and a second sliding hole is arranged in the top end of the cover body and coaxially slides with the air pipe.

4. The modified cold and hot press forming system of claim 2, wherein, The first heating unit has a heating plate fixedly connected to the bottom side of the upper die holder to conduct heat to the die.

5. The improved cold and hot press forming system of claim 4, wherein, The first hollow cover has a cover body with a bottom end being transparent, a first sliding hole is arranged in the top end of the cover body and coaxially slides with the top piece, and a second sliding hole is arranged in the top end of the cover body and coaxially slides with the air pipe.

6. The improved cold and hot press forming system of claim 1, wherein, The first vertical die clamping mechanism further includes a second hollow cover with a top end being transparent, which is located below the rotary disc and slides on the frame, and the top end opening is correspondingly arranged with the bottom end opening of the first hollow cover, and the second hollow cover is linearly reciprocated between a second closed position and a second open position, when the second hollow cover is located at the second closed position, the top end opening is in airtight abutment with the rotary disc, and the internal space of the second hollow cover defines a second working space isolated from the atmosphere, when the second hollow cover is located at the second open position, the top end of the second hollow cover is separated from the rotary disc, and a second driving part provides power required for displacement of the second hollow cover; The moving mechanism further includes at least one through hole arranged in the rotary disc and corresponding to the position of the die, so that the lower part of the die can communicate with the second working space through the through hole, and the area of the through hole is smaller than the area of the bottom end opening of the first hollow cover, smaller than the area of the top end opening of the second hollow cover, and smaller than the area of the die. When the die is located between the first hollow cover and the second hollow cover in the hot zone workstation for hot pressing forming, the first hollow cover and the second hollow cover are respectively located at the first closed position and the second closed position during processing, so that the first working space and the second working space are connected with each other through the through hole and maintain an isolated state from the atmosphere.

7. The modified cold and hot press forming system of claim 6, wherein, The frame has a columnar bottom piece which is vertically arranged below the rotary disc and slides with the second hollow cover, so that the second hollow cover is guided by the bottom piece to linearly reciprocate between the second closed position and the second open position.

8. The modified cold and hot press forming system of claim 7, wherein, The bottom piece is a fluid pressure cylinder.

9. The modified cold and hot press forming system of claim 7, wherein, The first vertical die clamping mechanism further includes a second heating unit which can provide heat in the second working space.

10. The modified cold and hot press forming system of claim 9, wherein, The second heating unit has a second heating plate fixedly arranged above the bottom piece in the second hollow cover.

11. The modified cold and hot press forming system of claim 10, wherein, The second heating unit further includes a second wire pipe which is vertically arranged on one side of the bottom piece parallel to the bottom piece and slides with the second hollow cover.

12. The modified cold and hot press forming system of claim 11, wherein, The vacuum unit further includes a second air pipe which is vertically arranged on the other side of the bottom piece parallel to the bottom piece and slides with the second hollow cover.

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