CN210501382U - Thermal forming die with novel shearing die cooling structure - Google Patents

Abstract

A thermal forming die with a novel shearing die cooling structure comprises an upper die and a lower die; the upper die comprises an upper die plate and an upper shearing die plate, at least one upper shearing die is arranged on the upper shearing die plate, and the upper shearing die plate are manufactured into a whole; the lower mould comprises a lower mould plate, a lower mould body, a lower shear mould plate and at least one forming mould, wherein at least one lower shear mould is arranged on the lower shear mould plate, and the lower shear mould plate are integrated into a whole, and the lower shear mould is characterized in that: the inner wall of the upper part of each upper shear die is respectively provided with an upper shear die cooling sleeve, and an upper shear die cooling channel is defined between the outer wall of the upper shear die cooling sleeve and the inner wall of the upper part of the corresponding upper shear die; and lower shear die cooling sleeves are respectively arranged on the inner walls of the lower parts of the lower shear dies, and lower shear die cooling channels are defined between the outer walls of the lower shear die cooling sleeves and the inner walls of the lower parts of the corresponding lower shear dies. The utility model discloses well upper shear die and lower shear die can both be by quick, evenly cooled off, consequently existing be favorable to preventing to go up shear die and lower shear die because of the high temperature warp, improve the life of shear die, are favorable to improving production efficiency again.

Description

Thermal forming die with novel shearing die cooling structure

Technical Field

The utility model relates to a thermoforming equipment, specifically speaking relates to a thermoforming mould with novel mould cooling structure cuts.

Background

The existing thermal forming die for manufacturing plastic containers (such as plastic cups, plastic boxes, plastic basins and the like) can complete forming and shearing actions. The hot forming die comprises an upper die and a lower die; the upper die comprises an upper die plate and an upper shearing die plate, the upper shearing die plate is arranged on the upper die plate and is positioned below the upper die plate, at least one upper shearing die is arranged on the upper shearing die plate, and the upper shearing die is provided with a cavity; the lower die comprises a lower die plate, a lower die body, a lower shearing die plate and at least one forming die, the lower die body is arranged on the lower die plate and is positioned above the lower die plate, the lower shearing die plate is arranged on the lower die body and is positioned above the lower die body, the lower shearing die plate is provided with at least one lower shearing die, the lower shearing dies are the same in number and are in one-to-one correspondence with the upper shearing dies, the forming dies are the same in number and are in one-to-one correspondence with the lower shearing dies, and the forming die is arranged on the lower die body and is positioned on the inner. Usually, the inner edge of the lower end of the upper shear die is an upper shear blade, the outer edge of the upper end of the lower shear die is a lower shear blade, and the lower shear blade is matched with the upper shear blade. The lower die usually further comprises an ejector rod mounting plate and at least one ejector rod, the ejector rods are the same in number and correspond to the forming dies one by one, each forming die comprises a side die and a movable bottom die, the side dies are mounted on the lower die body and located on the inner sides of the corresponding lower shearing dies, the movable bottom dies are connected with the upper ends of the corresponding ejector rods, the ejector rod mounting plates are arranged below the lower die plate, and the lower ends of the ejector rods extend out of the lower die plate and are connected with the ejector rod mounting plates. The upper die usually further comprises at least one pressing ring, the number of the pressing rings is the same as that of the upper shearing die, the pressing rings correspond to the upper shearing die one by one, the pressing rings are arranged in a cavity of the upper shearing die and can move up and down in the cavity of the upper shearing die, and the pressing rings press the sheet material on the lower die during die assembly. The upper die generally further includes at least one stretching head, at least one stretching rod, a stretching rod mounting plate, and a stretching rod mounting plate lift control mechanism, where the stretching heads are the same in number as the upper shear dies and are in one-to-one correspondence with the upper shear dies, the stretching rods are the same in number as the stretching heads and are in one-to-one correspondence with the upper shear dies, the stretching heads are disposed in cavities of the upper shear dies (in the case where material pressing rings are disposed in the cavities of the upper shear dies, the stretching heads are located in the cavities of the material pressing rings), the lower ends of the stretching rods are connected to the stretching heads, the upper ends of the stretching rods are connected to the.

In the thermoforming mold, the forming mold, the lower shear mold, the ejector rod, the upper shear mold, the material pressing ring and the stretching head form a forming unit, and one forming unit can form a plastic container. The side die is used for forming the side wall and the edge part of the plastic container; the movable bottom die is used for forming the bottom of the plastic container.

When the plastic container is manufactured, firstly, the plastic sheet is heated to enable the plastic sheet to reach the molding temperature; the heated plastic sheet passes through a forming area, at the moment, a thermoforming mold is closed, and under the drive of a stretching rod, each stretching head moves downwards in a cavity of an upper shearing mold to pre-stretch the plastic sheet, so that the shape and the size of the plastic sheet are close to those of a product; then, the plastic sheet is tightly attached to the forming die through positive pressure thermoforming (or negative pressure thermoforming); the formed sheet material is sheared by an upper shearing blade of an upper shearing die and a lower shearing blade of a lower shearing die, and the plastic container is sheared from the formed sheet material to obtain a single plastic container; then the ejector rod mounting plate drives each ejector rod and each movable bottom die to ascend relative to the lower die plate, and the plastic container is ejected out of the forming die, so that the plastic container is separated from the forming die; air is then blown into the plastic container to blow the plastic container away from the thermoforming mold.

Go up shear die and lower shear die and carry out the in-process of cuting to the shaping sheet in mutually supporting, because of contacting the higher plastic sheet of temperature, its temperature can rise, if can not in time, cool off fully, will make shear die and lower shear die high temperature, high temperature can lead to shear die and lower shear die to warp, wearing and tearing appear during the shearing cooperation, shorten life. In addition, if the temperature of the upper shear die and the lower shear die is too high, the plastic sheet can be adhered to the upper shear die or the lower shear die during shearing, and the normal production is influenced. At present, under the condition that an upper shear die and an upper shear die are designed in a split manner, and a lower shear die and a lower upper shear die are designed in a split manner, cooling water paths are generally arranged on the outer sides of the upper shear die and the lower shear die, and the upper shear die and the lower shear die are cooled after cooling water is introduced into the cooling water paths. Under the condition that the upper shear die and the upper shear die are manufactured into a whole, and the lower shear die are manufactured into a whole, a cooling water channel is formed by drilling holes in the upper shear die plate and the lower shear die plate, cooling water is introduced into the cooling water channel to cool the upper shear die and the lower shear die, however, the cooling water channel has a large distance from the upper shear blade and the upper shear blade, the cooling efficiency is low, the upper shear die and the lower shear die are difficult to be sufficiently cooled, and the linear cooling water channel can only be drilled through the drilling holes, so that the distances between each part of the upper shear die and the lower shear die and the cooling water channel are different, and all parts of the upper shear die and the lower shear die cannot be uniformly cooled.

Disclosure of Invention

The utility model aims to solve the technical problem that a thermoforming mould with novel shear die cooling structure is provided, this kind of thermoforming mould can realize shearing quick, the even cooling of mould (be promptly shear die and lower shear die), avoids shearing mould high temperature deformation, is favorable to improving the life who shears the mould. The technical scheme is as follows:

a thermal forming die with a novel shearing die cooling structure comprises an upper die and a lower die; the upper die comprises an upper die plate and an upper shearing die plate, the upper shearing die plate is arranged on the upper die plate and is positioned below the upper die plate, at least one upper shearing die is arranged on the upper shearing die plate, the upper shearing die and the upper shearing die plate are integrally manufactured, and the upper shearing die is provided with a cavity; the lower mould includes the lower bolster, the lower mould body, lower shear template and at least one moulded die, the lower mould body is installed on the lower bolster and is located in the lower bolster top, lower shear template is installed on the lower mould body and is in lower mould body top, be equipped with at least one lower shear die on the shear template down, lower shear die is integrative with lower shear template is made, lower shear die is the same with last shear die quantity and one-to-one, the moulded die is the same with lower shear die quantity and one-to-one, the moulded die is installed on the lower mould body and is in the inboard of the lower shear die of correspondence, characterized by: the inner wall of the upper part of each upper shear die is respectively provided with an upper shear die cooling sleeve, and an upper shear die cooling channel is defined between the outer wall of the upper shear die cooling sleeve and the inner wall of the upper part of the corresponding upper shear die; and lower shear die cooling sleeves are respectively arranged on the inner walls of the lower parts of the lower shear dies, and lower shear die cooling channels are defined between the outer walls of the lower shear die cooling sleeves and the inner walls of the lower parts of the corresponding lower shear dies.

Usually, the inner edge of the lower end of the upper shear die is an upper shear blade, the outer edge of the upper end of the lower shear die is a lower shear blade, and the lower shear blade is matched with the upper shear blade.

In the thermal forming die, the upper shear die is sleeved on the inner wall of the upper part of the upper shear die in a cooling manner, the upper shear die is close to and opposite to the upper shear blade, and after a cooling medium (such as cooling water) is introduced, the heat of the part where the upper shear blade is located can be quickly absorbed, so that the cooling efficiency is high; meanwhile, the shape of the upper shear die cooling sleeve is consistent with that of the upper shear die, so that the cooling strength of each part of the upper shear blade is similar, and the part where the upper shear blade is located can be uniformly cooled. The lower shear die is sleeved on the inner wall of the lower part of the lower shear die in a cooling way, the lower shear die is close to and opposite to the lower shear blade, and after a cooling medium (such as cooling water) is introduced, the heat of the part where the lower shear blade is located can be quickly absorbed, so that the cooling efficiency is high; meanwhile, the shape of the lower shear die cooling sleeve is consistent with that of the lower shear die, so that the cooling strength of each part of the lower shear blade is similar, and the part where the lower shear blade is located can be uniformly cooled. Because the upper shearing die and the lower shearing die can be cooled quickly and uniformly, the deformation of the upper shearing die and the lower shearing die due to overhigh temperature can be prevented, the service life of the shearing die is prolonged, and the production efficiency is improved.

Under the condition that the upper shear die is arranged on the upper shear die plate, the upper shear die cooling channel can be designed to be approximately C-shaped, and the two ends of the upper shear die cooling channel are respectively a water inlet end and a water outlet end; the upper shear die plate is provided with an upper water inlet connecting channel and an upper water outlet connecting channel, and the upper water inlet connecting channel and the upper water outlet connecting channel are respectively connected with a water inlet end and a water outlet end of the upper shear die cooling channel. Cooling medium (such as cooling water) flows through the upper water inlet connecting channel, the upper shear mold cooling channel and the upper water outlet connecting channel in sequence, and when flowing through the upper shear mold cooling channel, the cooling medium takes away heat on the corresponding upper shear mold to cool the upper shear mold.

In the case where a plurality of upper cutting dies are provided on the upper cutting die plate, all the upper cutting dies are arranged in one or more rows. The upper shear die cooling channels are annular, the upper shear die cooling channels on the same line are sequentially connected in series, the upper shear die plate is provided with an upper water inlet connecting channel, an upper water outlet connecting channel and at least one upper intermediate connecting channel, the upper water inlet connecting channel is connected with the first upper shear die cooling channel, the upper water outlet connecting channel is connected with the last upper shear die cooling channel, and the front and back adjacent upper shear die cooling channels are connected through the upper intermediate connecting channel. After entering the upper water inlet connecting channel, a cooling medium (such as cooling water) flows through each upper shear die cooling channel and finally flows out of the upper water outlet connecting channel, and when flowing through the upper shear die cooling channels, the cooling medium takes away heat on the corresponding upper shear die to cool the upper shear die.

Under the condition that a lower shear die is arranged on the lower shear template, the lower shear die cooling channel can be designed to be approximately C-shaped, and the two ends of the lower shear die cooling channel are respectively a water inlet end and a water outlet end; and the lower shear die plate is provided with a lower water inlet connecting channel and a lower water outlet connecting channel, and the lower water inlet connecting channel and the lower water outlet connecting channel are respectively connected with a water inlet end and a water outlet end of the lower shear die cooling channel. And a cooling medium (such as cooling water) flows through the lower water inlet connecting channel, the lower shear die cooling channel and the lower water outlet connecting channel in sequence, and when flowing through the lower shear die cooling channel, the cooling medium takes away the heat on the corresponding lower shear die to cool the lower shear die.

In the case where a plurality of lower shear dies are provided on the lower shear template, all the lower shear dies are arranged in one or more rows. The lower shear die cooling channels are annular, the lower shear die cooling channels on the same line are sequentially connected in series, the lower shear die plate is provided with a lower water inlet connecting channel, a lower water outlet connecting channel and at least one lower intermediate connecting channel, the lower water inlet connecting channel is connected with the foremost lower shear die cooling channel, the lower water outlet connecting channel is connected with the last lower shear die cooling channel, and the front and rear adjacent lower shear die cooling channels are connected through the lower intermediate connecting channel. After entering the lower water inlet connecting channel, a cooling medium (such as cooling water) flows through each lower shear die cooling channel and finally flows out of the lower water outlet connecting channel, and when flowing through the lower shear die cooling channels, the cooling medium takes away the heat on the corresponding lower shear die to cool the lower shear die.

In a preferred scheme, an upper annular limiting step is arranged in the middle of the inner wall of the upper shear die, and the lower end of the upper shear die cooling sleeve is in close contact with the upper annular limiting step. The upper annular limiting step can limit the upper shear mold cooling sleeve in the up-down direction, so that the upper shear mold cooling sleeve can be accurately installed in place.

In a specific scheme, two sealing rings are installed on the outer wall of the upper shear mold cooling jacket, the two sealing rings are respectively positioned on the upper side and the lower side of the upper shear mold cooling channel, and the two sealing rings are in close contact with the upper shear mold.

Usually, the inner wall of the upper shear mold cooling jacket is smoothly connected with the lower part of the inner wall of the upper shear mold.

In a preferred scheme, the middle part of the inner wall of the lower shear die is provided with a lower annular limiting step, and the upper end of the lower shear die cooling jacket is in close contact with the lower annular limiting step. The lower annular limiting step can limit the position of the lower shear die cooling sleeve in the vertical direction, so that the lower shear die cooling sleeve can be accurately installed in place.

In a specific scheme, two sealing rings are installed on the outer wall of the lower shear mold cooling jacket, the two sealing rings are respectively located on the upper side and the lower side of the lower shear mold cooling channel, and the two sealing rings are in close contact with the lower shear mold.

Usually, the inner wall of the cooling jacket of the lower shear die is smoothly connected with the upper part of the inner wall of the lower shear die.

In a preferred scheme, the forming die comprises a side die and a movable bottom die, the side die is installed on the lower die body and is positioned on the inner side of the lower shearing die, the movable bottom die is arranged on the inner side of the side die, the movable bottom die is connected with the upper end of the ejector rod, and the lower end of the ejector rod extends out of the lower die plate and is connected with the ejector rod installing plate; a side mold cooling channel is enclosed between the outer wall of the side mold and the lower mold body, and a movable bottom mold cooling channel is arranged in the movable bottom mold (a movable bottom mold water inlet channel and a movable bottom mold water outlet channel can be arranged in the ejector rod, and the upper end of the movable bottom mold water inlet channel and the upper end of the movable bottom mold water outlet channel are respectively communicated with the water inlet end and the water outlet end of the movable bottom mold cooling channel).

During molding, the upper die can be fixed on the frame, and the lower die can be lifted relative to the upper die; the lower die can also be fixed on the frame, and the upper die can be lifted relative to the lower die.

The utility model discloses a set up the direct shear die cooling to last shear die cooling jacket, set up the direct shear die cooling to down of shear die cooling jacket down for go up shear die and lower shear die can both be by quick, even cooling, consequently existing be favorable to preventing to go up shear die and lower shear die warp because of the high temperature, improve the life of shear die, be favorable to improving production efficiency again.

Drawings

Fig. 1 is a schematic structural view (mold clamping state) of a preferred embodiment 1 of the present invention;

FIG. 2 is a schematic structural view of an upper and a lower shear mold cooling passages according to a preferred embodiment 1 of the present invention;

fig. 3 is a schematic structural view of an upper shear mold cooling channel and a lower shear mold cooling channel in preferred embodiment 2 of the present invention.

Detailed Description

Example 1

As shown in fig. 1, the thermoforming mold having the novel shear mold cooling structure includes an upper mold 1 and a lower mold 2.

The upper die 1 comprises an upper die plate 11 and an upper shear die plate 12, the upper shear die plate 12 is mounted on the upper die plate 11 and is positioned below the upper die plate 11, an upper shear die 13 is arranged on the upper shear die plate 12, the upper shear die 13 and the upper shear die plate 12 are integrated, and the upper shear die 13 is provided with a cavity. An upper shear die cooling jacket 14 is arranged on the inner wall of the upper part of the upper shear die 13, and an upper shear die cooling channel 15 is enclosed between the outer wall of the upper shear die cooling jacket 14 and the inner wall of the upper part of the upper shear die 13.

Referring to fig. 2, the upper shear mold cooling channel 15 is substantially C-shaped, and has a water inlet end 151 and a water outlet end 152 at its two ends; the upper shear template 12 is provided with an upper water inlet connecting channel 16 and an upper water outlet connecting channel 17, and the upper water inlet connecting channel 16 and the upper water outlet connecting channel 17 are respectively connected with a water inlet end 151 and a water outlet end 152 of the upper shear mold cooling channel 15.

In this embodiment, an upper annular limiting step 18 is disposed in the middle of the inner wall of the upper shear die 13, and the lower end of the upper shear die cooling jacket 14 is in close contact with the upper annular limiting step 18. The upper annular limiting step 18 can limit the upper shear mold cooling jacket 14 in the up-down direction, so that the upper shear mold cooling jacket 14 can be accurately installed in place. Two sealing rings 19 and 110 are mounted on the outer wall of the upper shear mold cooling jacket 14, the two sealing rings 19 and 110 are respectively positioned at the upper side and the lower side of the upper shear mold cooling channel 15, and the two sealing rings 19 and 110 are both in close contact with the upper shear mold 13. The inner wall of the upper shear mould cooling jacket 14 is smoothly connected with the lower part of the inner wall of the upper shear mould 13.

The upper die 1 further comprises a pressing ring 111, the pressing ring 111 is arranged in the cavity of the upper shear die 13, and the lower end surface of the pressing ring 111 is matched with the upper end surface of the lower shear die 25 and corresponds in position. The material pressing ring 111 can move up and down in the cavity of the upper shear die 13, and the plastic sheet is pressed on the lower die 2 by the material pressing ring 111 when the die is closed. In this embodiment, a compression spring 112 is installed between the pressing ring 111 and the upper die plate 11, and when the compression spring 112 contracts, the pressing ring 111 can apply a certain pressure to the plastic sheet to be molded.

The upper die 1 further comprises a stretching mechanism, the stretching mechanism comprises a stretching head 113, a stretching rod 114, a stretching rod mounting plate 115 and a stretching rod mounting plate lifting control mechanism, the stretching head 113 is arranged in a cavity of the upper shear die 13 (the stretching head 113 is arranged in the cavity of the material pressing ring 111), the lower end of the stretching rod 114 is connected with the stretching head 113, the upper ends of the stretching rods 114 extend out of the upper portion of the upper die plate 11 and are connected with the stretching rod mounting plate 115, and the stretching rod mounting plate 115 is connected with the stretching rod mounting plate lifting control mechanism. The lifting control mechanism of the stretching rod mounting plate can be arranged on the upper template; the lifting control mechanism of the stretching rod mounting plate can also be arranged on the frame under the condition that the upper die is fixed on the frame. The stretching rod mounting plate lifting control mechanism is used for driving the stretching rod 114 to move up and down; the stretching head 113 is movable up and down in the cavity of the upper shear die 13 by the driving of the stretching rod 114. When the stretching rod mounting plate lifting control mechanism drives the stretching rod mounting plate 115 to lift, the stretching rod mounting plate 115, the stretching rod 114 and the stretching head 113 lift together, and the sheet to be formed is prestretched when the stretching head 113 descends. The stretching rod mounting plate lifting control mechanism can comprise a stretching cylinder, and the stretching rod mounting plate is connected with a piston rod of the stretching cylinder; the cylinder body of the stretching cylinder can be arranged on the upper template; the cylinder body of the stretching cylinder can also be arranged on the frame under the condition that the upper die is fixed on the frame.

The lower die 2 comprises a lower die plate 21, a lower die body 22, a lower shear die plate 23 and a forming die 24, the lower die body 22 is mounted on the lower die plate 21 and is located above the lower die plate 21, the lower shear die plate 23 is mounted on the lower die body 22 and is located above the lower die body 22, a lower shear die 25 is arranged on the lower shear die plate 23, the lower shear die 25 and the lower shear die plate 23 are integrally formed, and the forming die 24 is mounted on the lower die body 22 and is located on the inner side of the lower shear die 25. A lower shear die cooling jacket 26 is arranged on the inner wall of the lower part of the lower shear die 25, and a lower shear die cooling channel 27 is defined between the outer wall of the lower shear die cooling jacket 26 and the inner wall of the lower part of the lower shear die 25.

Referring to fig. 2, the lower shear mold cooling channel 27 is designed to be substantially C-shaped, and has a water inlet end 271 and a water outlet end 272 at two ends thereof; the lower shear die plate 23 is provided with a lower water inlet connecting channel 28 and a lower water outlet connecting channel 29, and the lower water inlet connecting channel 28 and the lower water outlet connecting channel 29 are respectively connected with a water inlet end 271 and a water outlet end 272 of the lower shear die cooling channel 27.

In this embodiment, a lower annular limiting step 210 is disposed in the middle of the inner wall of the lower shear die 25, and the upper end of the lower shear die cooling jacket 26 is in close contact with the lower annular limiting step 210. The lower annular limiting step 210 can limit the position of the lower shear mold cooling jacket 26 in the up-down direction, so that the lower shear mold cooling jacket 26 can be accurately installed in place. Two sealing rings 211 and 212 are installed on the outer wall of the lower shear mold cooling jacket 26, the two sealing rings 211 and 212 are respectively located at the upper side and the lower side of the lower shear mold cooling channel 29, and the two sealing rings 211 and 212 are both in close contact with the lower shear mold 25. The inner wall of the lower shear die cooling jacket 26 is smoothly connected with the upper part of the inner wall of the lower shear die 25.

In this embodiment, the forming mold 24 includes a side mold 241 and a movable bottom mold 242, the side mold 241 is installed on the lower mold body 22 and located inside the lower shear mold 25, the movable bottom mold 242 is located inside the side mold 241, the movable bottom mold 242 is connected to the upper end of the ejector rod 213, and the lower end of the ejector rod 213 extends to below the lower mold plate 21 and is connected to the ejector rod mounting plate 214; a side mold cooling channel 215 is enclosed between the outer wall of the side mold 241 and the lower mold body 22, a movable bottom mold cooling channel 216 is arranged in the movable bottom mold 242, a movable bottom mold water inlet channel 217 and a movable bottom mold water outlet channel 218 are arranged in the ejector rod 213, and the upper end of the movable bottom mold water inlet channel 217 and the upper end of the movable bottom mold water outlet channel 218 are respectively communicated with the water inlet end and the water outlet end of the movable bottom mold cooling channel 216.

A limiting shaft 219 moving up and down is arranged on the lower template 21, a limiting through hole 220 is arranged on the ejector rod mounting plate 214, the limiting shaft 219 is positioned in the limiting through hole 220, a lower limiting washer 221 is arranged at the lower end of the limiting shaft 219, and the lower limiting washer 221 is positioned below the ejector rod mounting plate 214; when the lower surface of the knock-out bar mounting plate 214 contacts the upper end surface of the lower limit washer 221 during the descent of the knock-out bar mounting plate 214, the knock-out bar mounting plate 214 does not descend any more.

The inner edge of the lower end of the upper shear die 13 is an upper shear blade, the outer edge of the upper end of the lower shear die 25 is a lower shear blade, and the lower shear blade is matched with the upper shear blade.

The working principle of the thermoforming mold is briefly described as follows:

during molding, the upper die 1 is fixed on the frame, and the lower die 2 is lifted relative to the upper die 1.

When the plastic container is manufactured, firstly, the plastic sheet is heated to enable the plastic sheet to reach the molding temperature; the heated plastic sheet passes through the molding area, the thermoforming mold is closed at the moment, the compression spring 112 applies downward thrust to the pressing ring 111, so that the pressing ring 111 presses the plastic sheet on the upper end surface of the lower shear mold 25, and a molding air chamber is formed between the plastic sheet and the cavity of the upper shear mold 13; then the stretching rod mounting plate lifting control mechanism drives the stretching rod mounting plate 115 to descend, and the stretching rod mounting plate 115, the stretching rod 114 and the stretching head 113 descend together; the stretching head 113 prestretches the plastic sheet; then the compressed air enters the forming air chamber, the plastic sheet is tightly attached to the forming die 24 under the action of the compressed air, so that the plastic sheet is formed, and cooling water is introduced into the edge forming die cooling channel 215 and the movable bottom die cooling channel 216 to cool the forming die 24, so that the formed sheet is shaped; then the stretching rod mounting plate lifting control mechanism drives the stretching rod mounting plate 115, the stretching rod 114 and the stretching head 113 to lift together, and the stretching head 113 returns to the cavity of the upper shear die 13; then the lower die 2 further rises, the lower shearing blade at the outer edge of the upper end of the lower shearing die 25 is matched with the upper shearing blade at the inner edge of the lower end of the upper shearing die 13, the shaped formed sheet is sheared, and the plastic container is sheared from the formed sheet; the lower die 2 is then lowered, the edge of the plastic container leaving the presser ring 111; then the ejector rod mounting plate 214 drives the movable bottom die 242 to ascend relative to the lower die plate 21 through the ejector rod 213, and ejects the plastic product from the forming die 24, so that the plastic container is separated from the forming die 24; air may then be blown into the plastic container to blow the plastic container away from the thermoforming mold, thereby completing the one-shot thermoforming process. The ejector rod mounting plate 214, the ejector rod 213, and the movable bottom die 242 are then lowered to the desired position for the next thermal forming process.

The cooling principle of the upper shear die 13 is as follows: a cooling medium (such as cooling water) sequentially flows through the upper water inlet connecting channel 16, the upper shear mold cooling channel 15 and the upper water outlet connecting channel 17, and when flowing through the upper shear mold cooling channel 15, the cooling medium takes away heat on the corresponding upper shear mold 13 to cool the upper shear mold 13. The upper shear die cooling jacket 14 is arranged on the inner wall of the upper part of the upper shear die 13, is close to and opposite to the upper shear blade, and can quickly absorb the heat of the part where the upper shear blade is located after a cooling medium (such as cooling water) is introduced, so that the cooling efficiency is high; meanwhile, the shape of the upper shear die cooling jacket 15 is consistent with that of the upper shear die 13, so that the cooling strength of each part of the upper shear blade is similar, and the part of the upper shear blade can be uniformly cooled.

The cooling principle of the lower shear die 25 is as follows: a cooling medium (e.g., cooling water) flows through the lower water inlet connecting channel 28, the lower shear mold cooling channel 27 and the lower water outlet connecting channel 29 in sequence, and when flowing through the lower shear mold cooling channel 27, the cooling medium takes away heat on the corresponding lower shear mold 25 to cool the lower shear mold 25. The lower shear die cooling jacket 26 is arranged on the inner wall of the lower part of the lower shear die 25, is close to and opposite to the lower shear blade, and can quickly absorb the heat of the part where the lower shear blade is located after a cooling medium (such as cooling water) is introduced, so that the cooling efficiency is high; meanwhile, the shape of the lower shear die cooling jacket 26 is the same as that of the lower shear die 25, so that the cooling strength of each part of the lower shear blade is similar, and the part of the lower shear blade can be uniformly cooled.

Example 2

In the embodiment, a plurality of upper shearing dies are arranged on the upper shearing die plate, and all the upper shearing dies are arranged in one line or a plurality of lines; the lower shear template is provided with a plurality of lower shear dies, and all the lower shear dies are arranged in one line or a plurality of lines.

Referring to fig. 3, the upper shear die cooling channels 15 are annular, the upper shear die cooling channels 15 in the same row are sequentially connected in series, the upper shear die plate 12 is provided with an upper water inlet connecting channel 16, an upper water outlet connecting channel 17 and at least one upper middle connecting channel 116, the upper water inlet connecting channel 16 is connected with the foremost upper shear die cooling channel 15, the upper water outlet connecting channel 17 is connected with the last upper shear die cooling channel 15, and the front and rear adjacent upper shear die cooling channels 15 are connected through one upper middle connecting channel 116. After entering the upper water inlet connecting channel 16, a cooling medium (such as cooling water) flows through each upper shear die cooling channel 15 and finally flows out of the upper water outlet connecting channel 17, and when flowing through the upper shear die cooling channels 15, the cooling medium takes away heat on the corresponding upper shear die to cool the upper shear die.

Referring to fig. 3, the lower shear mold cooling channels 27 are annular, the lower shear mold cooling channels 27 in the same row are sequentially connected in series, the lower shear mold plate 23 is provided with a lower water inlet connecting channel 28, a lower water outlet connecting channel 29 and at least one lower intermediate connecting channel 222, the lower water inlet connecting channel 28 is connected with the foremost lower shear mold cooling channel 27, the lower water outlet connecting channel 29 is connected with the last lower shear mold cooling channel 27, and the two lower shear mold cooling channels 27 adjacent to each other in the front-back direction are connected through the lower intermediate connecting channel 222. After entering the lower water inlet connecting channel 28, the cooling medium (e.g., cooling water) flows through each lower shear die cooling channel 27 and finally flows out of the lower water outlet connecting channel 29, and when flowing through the lower shear die cooling channels 27, the cooling medium takes away heat on the corresponding lower shear die to cool the lower shear die.

The rest of the structure of this embodiment can be configured as described in embodiment 1.

Claims (7)

1. A thermal forming die with a novel shearing die cooling structure comprises an upper die and a lower die; the upper die comprises an upper die plate and an upper shearing die plate, the upper shearing die plate is arranged on the upper die plate and is positioned below the upper die plate, at least one upper shearing die is arranged on the upper shearing die plate, the upper shearing die and the upper shearing die plate are integrally manufactured, and the upper shearing die is provided with a cavity; the lower mould includes the lower bolster, the lower mould body, lower shear template and at least one moulded die, the lower mould body is installed on the lower bolster and is located in the lower bolster top, lower shear template is installed on the lower mould body and is in lower mould body top, be equipped with at least one lower shear die on the shear template down, lower shear die is integrative with lower shear template is made, lower shear die is the same with last shear die quantity and one-to-one, the moulded die is the same with lower shear die quantity and one-to-one, the moulded die is installed on the lower mould body and is in the inboard of the lower shear die of correspondence, characterized by: the inner wall of the upper part of each upper shear die is respectively provided with an upper shear die cooling sleeve, and an upper shear die cooling channel is defined between the outer wall of the upper shear die cooling sleeve and the inner wall of the upper part of the corresponding upper shear die; and lower shear die cooling sleeves are respectively arranged on the inner walls of the lower parts of the lower shear dies, and lower shear die cooling channels are defined between the outer walls of the lower shear die cooling sleeves and the inner walls of the lower parts of the corresponding lower shear dies.

2. The thermoforming mold of claim 1, wherein: and the middle part of the inner wall of the upper shear die is provided with an upper annular limiting step, and the lower end of the upper shear die cooling sleeve is in close contact with the upper annular limiting step.

3. The thermoforming mold of claim 2, wherein: two sealing rings are mounted on the outer wall of the upper shear mold cooling sleeve, the two sealing rings are respectively located on the upper side and the lower side of the upper shear mold cooling channel, and the two sealing rings are in close contact with the upper shear mold.

4. The thermoforming mold of claim 1, wherein: and the middle part of the inner wall of the lower shear die is provided with a lower annular limiting step, and the upper end of the lower shear die cooling sleeve is in close contact with the lower annular limiting step.

5. The thermoforming mold of claim 4, wherein: two sealing rings are mounted on the outer wall of the lower shear die cooling sleeve, the two sealing rings are respectively located on the upper side and the lower side of the lower shear die cooling channel, and the two sealing rings are in close contact with the lower shear die.

6. A thermoforming mould as claimed in any of claims 1 to 5, wherein: the forming die comprises a side die and a movable bottom die, the side die is arranged on the lower die body and is positioned on the inner side of the lower shearing die, the movable bottom die is arranged on the inner side of the side die, the movable bottom die is connected with the upper end of the ejector rod, and the lower end of the ejector rod extends out of the lower die plate and is connected with the ejector rod mounting plate; a side die cooling channel is enclosed between the outer wall of the side die and the lower die body, and a movable bottom die cooling channel is arranged in the movable bottom die.

7. The thermoforming mold of claim 6, wherein: and the upper end of the water inlet channel of the movable bottom die and the upper end of the water outlet channel of the movable bottom die are respectively communicated with the water inlet end and the water outlet end of the cooling channel of the movable bottom die.

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