TWI386301B - Mold apparatus and molding method using same - Google Patents

Description

Mold device and molding method using the same

The present invention relates to a mold apparatus, and more particularly to a mold apparatus having a plurality of mold cavities and a molding method using the mold apparatus.

The mold unit is an important tool for injection molding products. A mold device may have multiple mold cavities, so-called multi-cavity. Each cavity is connected to a flow path, each flow path being connected to a nozzle (the nozzle is provided by the nozzle bushing) and the nozzle being connected to an injection machine. During injection molding, the shot material is added to the barrel of the injection machine, heated to a molten state, pushed by the screw or plunger of the injection machine, enters the nozzle through the nozzle of the injection machine, and is branched into the respective flow channels, thereby Enter each cavity.

However, for various reasons, a cavity may not be used to mold a product, for example, it has been damaged. In this case, the entire mold unit usually needs to be replaced, or the cavity to be damaged is repaired. They are used together for molding, and therefore, the production efficiency of the mold device is not so high, and it is difficult to ensure the continuity of production.

In view of the above, it is necessary to provide a mold device that facilitates selective molding of a cavity, and a molding method using the same.

A mold apparatus includes a first mold core, a second mold core, a nozzle bushing penetrating the first mold core, a first insert member and a second insert member. The first mold core has a first surface, the first surface is opened inwardly with a first cavity and a second cavity, and two are respectively connected to the first cavity and the second cavity A shunt channel. Said The second mold core has a second surface opposite to the first surface of the first mold core, the second surface is provided with a third mold cavity and a fourth mold cavity inwardly, and two respectively The second cavity and the fourth cavity are connected to the second branching channel. The first cavity and the third cavity are combined to form a first cavity, and the second cavity and the fourth cavity are combined to form a second cavity. The nozzle bushing includes a nozzle penetrating therethrough and a nozzle wall, and the nozzle wall is provided with two diverting grooves respectively connecting the nozzle port and the two first diverting channels, The two-dividing channel is combined with the first splitting channel and the splitting channel to form two flow paths that communicate the nozzle with the first cavity and the second cavity. Wherein, the two splitting grooves of the nozzle wall each have a hole inward; the mold device further includes a first insert and a second insert, and the first insert and the second insert respectively For inserting into a cavity, the first insert has a stop portion protruding from the hole and cooperating with the flow channel, and the second insert surface is opened and the hole is in the flow channel The opening shape matches the compensation groove, the stop portion is configured to block the flow path where the nozzle is located to block the connection between the nozzle and the first cavity, and the compensation groove is used for compensating the flow channel to be connected The nozzle is connected to the second cavity.

A molding method using the above mold device, comprising the steps of: selecting a first mold cavity, a second mold cavity or simultaneously selecting a first mold cavity and a second mold cavity for molding; confirming whether there is an unselected cavity If yes, first insert the first insert into the hole of the splitting groove corresponding to the selected cavity to block the connection between the nozzle and the unselected cavity, and then insert the second insert. The cavity in the corresponding cavity corresponds to the cavity of the splitting groove to connect the nozzle with the selected cavity; if not, Then directly inserting the second insert into the cavity of the splitting groove corresponding to the selected cavity to communicate the nozzle with the selected cavity; combining the first die and the second die, and passing the note The mouth and the flow channel are filled and formed on the selected cavity.

Compared with the prior art, the mold device utilizes the design of the nozzle bushing, and the use of the first insert and the second insert facilitates selective shaping of the respective cavities, increasing flexibility of use of the entire mold device. . The first insert and the second insert are sealed or compensated at the nozzle bushing, that is, the flow can be quickly flowed into the selected cavity during molding.

The mold device provided by the present invention and the molding method using the same will be further described in detail below with reference to the accompanying drawings.

Referring to FIG. 1 to FIG. 3 , the mold apparatus 100 of the embodiment of the present invention includes a first mold core 10 , a second mold core 20 , and a nozzle bushing 30 extending through the first mold core 10 . Two first inserts 40 and two second inserts 50.

The first mold core 10 has a first surface 102 and an opposite third surface 104. A through hole 12 is defined between the first surface 102 and the third surface 104 for fitting the nozzle bushing 30 and matching the shape of the nozzle bushing 30. The first surface 102 faces the second mold core 20 as a parting surface. The first surface 102 is internally provided with two first cavities 14 of opposite shape, two third cavities 16 of opposite shape, and four connected to the first cavities 14, respectively. The three mold holes 16 and the first split passage 18 of the through hole 12. The shape of the first cavity 14 and the third cavity 16 Not identical, and the lines connecting the two first cavities 14 and the two third cavities 16 are perpendicular to each other. The shape of the four first branch passages 18 can be designed as needed, and in this embodiment, they are all semi-cylindrical.

The second mold core 20 has a second surface 202 and an opposite fourth surface 204. The second surface 202 faces the first mold core 10 as a parting surface. The second surface 202 is internally provided with two oppositely shaped second cavities 24, two oppositely shaped fourth cavities 26, and four second diverting channels 28. Wherein, the second cavity 24 and the fourth cavity 26 are different in shape, and the two second flow channels 28 connected to the second cavity 24 are connected to each other, and the two connection holes are opposite to the fourth cavity 26 The two split channels 28 are in communication with each other. The four second split channels 28 are also all semi-cylindrical. The second mold core 20 can also open a plurality of ejector holes (not shown) to assemble a thimble for ejecting the molded product.

The nozzle bushing 30 is assembled in the through hole 12 of the first mold core 10, and its outer shape is matched with the through hole 12. In the embodiment, the nozzle bushing 30 and the through hole 12 are both Round step shape. The nozzle bushing 30 also protrudes from the first mold core 10 and is coupled to a mold base and an injection machine (not shown). The nozzle bushing 30 includes a spout 32 therethrough and a sprue wall 34. The surface of the nozzle wall 34 is provided with four diverting grooves 38 which are separated from the nozzle 32 inwardly. The four splitter grooves 38 are respectively connected to the four first split channels 18 of the first mold core 10, and are also semi-cylindrical. The four split channels 38 are each open with an aperture 36 therein. Each of the cavities 36 has a stepped shape including a cylindrical portion of the splitter groove 38 where the connection is located and a square portion joined to the cylindrical portion. The diameter of the cylindrical portion of each of the cavities 36 is equal to the diameter of the diverting groove 38 .

Referring to FIG. 4 and FIG. 5 together, the two first cavities 14 and the two third cavities 24 can be combined to form two first cavities 64, and the two second cavities 16 and two. After the fourth cavity 26 is combined, two second cavities 66 can be formed. The first cavity 64 and the second cavity 66 are different in shape and can be used to form different products. The four second split passages 28 are combined with the four first split passages 18 and the four splitter passages 38 to form four complete cylindrical flow passages 68 that respectively communicate with the The nozzle 32 is connected to the two first cavities 64 and the two second cavities 66.

The two first inserts 40 respectively include a first cylindrical body 42, a first protrusion 44 protruding from one end of the first cylindrical body 42, and one protruding from the other end of the first cylindrical body 42. The second protrusion 46. The first cylindrical body 42 mates with a cylindrical portion of the aperture 36, and one of the first cylindrical bodies 42 partially protrudes from the aperture 36 in which it is located. The cross-sectional shape of the first protrusion 44 is the same as the cross-sectional shape of the second shunt channel 68. In this embodiment, the first protrusion 44 is hemispherical and has a radius equal to the radius of the second shunt channel 28. . The second protrusion 46 is square and fits into a square portion of the aperture 36. One portion of the first cylindrical body 42 and the first protrusion 44 form a stop portion that protrudes from the hole 36 and blocks the flow path 68 where it is located, thus blocking the nozzle 32 and the first one The cavity 64 or a second cavity 66 is in communication. The second projection 46 acts to prevent rotation, thereby helping to position the entire first insert 40 in the corresponding aperture 36.

The two second inserts 50 respectively include a second cylindrical body 52 A compensation groove 54 formed at one end of the second cylindrical body 52, and a second protrusion 56 projecting from the other end of the second cylindrical body 52. The first cylindrical body 42 mates with the cylindrical portion of the aperture 36 and is fully embedded in the aperture 36. The shape of the compensation groove 54 is the same as the shape of the opening of the hole 36 in the splitting groove 38. The second protrusion 56 is square and fits into the square portion of the aperture 36. The compensation groove 54 can compensate for the portion of the diverting groove 38 in the cavity 36 to communicate the nozzle 32 with the first cavity 64 or the second cavity 66. The second projection 56 acts to prevent rotation, thereby helping to position the entire second insert 50 in the corresponding aperture 36.

The mold apparatus 100 may be shaped according to the following steps: (1) selecting a desired first mold cavity 64 or a second mold cavity 66 to be ready for molding, for example, simultaneously selecting two second mold cavities 66 for molding; (2) using two first inserts 40 to embed in the two holes 36 of the two split grooves 38 corresponding to the two selected first cavities 64 to block the spout 32 and the unselected The connection of the two first cavities 64, that is, the two first inserts 40 block the flow path 68; (3) the use of the two second inserts 50 to embed the selected two second cavities 66 corresponding thereto Two holes 36 of the two branching grooves 38 are connected to communicate with the nozzle 32 and the selected two second cavities 66, that is, the two second inserts 50 compensate for the flow path 68; (4) The first mold core 10 and the second mold core 20 are combined, and the selected two second mold cavities 66 are injection molded through the nozzle 32 and the cylindrical flow path 68.

When the molding is completed, the two first inserts 40 and the two second inserts 50 can be pulled out.

It can be understood that the two first mold cavities 64 and the two second mold cavities 66 in the mold device 100 can be designed to be the same, so that the four mold cavities can be simultaneously selected for molding. The four second inserts 50 can be used directly to compensate for the laying flow path without the need to use the first insert 40. Of course, when a cavity is damaged, a first insert 40 can also be used to seal the flow path.

The mold apparatus 100 may also have only one first mold cavity 64 and one second mold cavity 66.

In addition, the stop portion of the first insert 40 is not limited to the above-mentioned one portion including the first cylindrical body 42 and the first protrusion 44, and the stop portion only needs to be connected with the flow path. 68 can be combined.

The mold device 100 utilizes the design of the nozzle bushing 30, and the use of the first insert 40 and the second insert 50 to facilitate selective molding of the respective cavities, increasing the flexibility of use of the entire mold device 100. The first insert 40 and the second insert 50 are occluded or compensated for at the nozzle bushing 30, that is, the flow channel 68 can be quickly laid out to the selected cavity during molding.

In summary, the present invention complies with the requirements of the invention patent and submits a patent application according to law. However, the above description is only a preferred embodiment of the present invention, and the scope of the present invention is not limited to the above-described embodiments, and equivalent modifications or variations made by those skilled in the art in accordance with the spirit of the present invention are It should be covered by the following patent application.

100‧‧‧Molding device

10‧‧‧The first model

20‧‧‧The second mold

30‧‧‧notch bushing

40‧‧‧First insert

50‧‧‧Second insert

102‧‧‧ first surface

104‧‧‧ third surface

202‧‧‧ second surface

204‧‧‧ fourth surface

12‧‧‧through hole

14‧‧‧First cavity

16‧‧‧The third cavity

24‧‧‧Second cavity

26‧‧‧The fourth cavity

18‧‧‧First shunt channel

28‧‧‧Second shunt channel

32‧‧‧ mouthpiece

34‧‧‧ mouth wall

36‧‧‧ holes

38‧‧‧Split trench

42‧‧‧First cylindrical body

44‧‧‧First protrusion

46,56‧‧‧second protrusion

52‧‧‧Second cylindrical body

68‧‧‧ flow path

64‧‧‧First cavity

68‧‧‧Second cavity

1 is a perspective exploded view of a mold apparatus according to an embodiment of the present invention.

2 is a schematic view of another perspective view of the second mold core in the mold apparatus of FIG. 1.

Figure 3 is a schematic view of the mold device of Figure 1 after assembly.

Figure 4 is a cross-sectional view taken along line IV-IV of Figure 3.

Figure 5 is a cross-sectional view taken along line V-V of Figure 3.

100‧‧‧Molding device

10‧‧‧The first model

20‧‧‧The second mold

30‧‧‧notch bushing

40‧‧‧First insert

50‧‧‧Second insert

102‧‧‧ first surface

104‧‧‧ third surface

202‧‧‧ second surface

204‧‧‧ fourth surface

12‧‧‧through hole

14‧‧‧First cavity

16‧‧‧The third cavity

18‧‧‧First shunt channel

28‧‧‧Second shunt channel

32‧‧‧ mouthpiece

34‧‧‧ mouth wall

36‧‧‧ holes

38‧‧‧Split trench

42‧‧‧First cylindrical body

44‧‧‧First protrusion

46,56‧‧‧second protrusion

52‧‧‧Second cylindrical body

Claims (10)

A mold apparatus comprising: a first mold core, the first mold core has a first surface, the first surface is provided with a first mold hole and a second mold hole, and two respectively a first shunt passage connected to the first cavity and the second cavity; a second die having a second surface opposite to the first surface of the first die, the first The second surface is provided with a third cavity and a fourth cavity, and two second diversion channels respectively connected to the third cavity and the fourth cavity, the first cavity and the third cavity Forming a first cavity by combining the cavity, the second cavity and the fourth cavity are combined to form a second cavity; a nozzle bushing penetrating the first die, the nozzle bushing The utility model comprises a nozzle penetrating therethrough and a nozzle wall, wherein the nozzle wall is provided with two diverting grooves respectively connecting the nozzle port and the two first diverting channels, the second diverting channel and the first The splitting channel and the splitting groove are combined to form two flow passages connecting the nozzle with the first cavity and the second cavity, The improvement is that the two splitting grooves of the nozzle wall each have a hole inward; the mold device further includes a first insert and a second insert, the first insert and the second insert Separatingly for embedding into a cavity, the first insert has a stop portion protruding from the hole and cooperating with the flow channel, and the surface of the second insert is opened and the hole is in the flow The opening shape of the channel matches the compensation groove, and the stop portion is configured to block the flow path where the nozzle is located to block the connection between the nozzle and the first cavity, and the compensation groove is used to compensate the flow path where the channel is located Connecting the nozzle to the second cavity. The mold apparatus of claim 1, wherein the first The cavity is different in shape from the second cavity, and the first cavity and the second cavity form an angle equal to 90 degrees with the nozzle. The mold device of claim 1, wherein the first cavity and the second cavity have the same shape, and the first cavity, the second cavity and the nozzle are located on the same straight line on. The mold device of claim 1, wherein the second shunt passage and the split groove have a semi-circular cross-sectional shape, and the first and second cavities respectively comprise a shunt a cylindrical portion communicating with the groove, wherein the diameter of the cylindrical portion is equal to the diameter of the splitter groove, the first insert member comprising a first cylindrical body and an end portion of the first cylindrical body a first protrusion protruding outwardly and having a semi-circular cross-sectional shape, the first cylindrical body mating with a cylindrical portion of the first cavity, and a portion of the first cylindrical body protruding from the first portion a hole having a radius equal to a radius of the second splitting passage, the stop portion of the first insert comprising a portion of the first cylindrical body and a first protrusion, the first The two inserts include a second cylindrical body that is completely embedded in the second cavity, and the compensation groove is formed at one end of the second cylindrical body. The mold apparatus of claim 4, wherein the first and second cavities further comprise a square portion connected to the cylindrical portion, and the first cylindrical body of the first insert member And the other end of the second cylindrical body of the second insert further has a square second protrusion. The mold device of claim 1, wherein the first shunt passage, the second shunt passage, and the splitter have a cross-sectional shape that is semi-circular and equal in radius. A molding method using the mold apparatus according to claim 1, comprising the steps of: selecting a first mold cavity, a second mold cavity, or simultaneously selecting a first mold cavity and a second mold cavity for molding; confirming presence or absence The cavity is not selected, and if so, the first insert is first embedded in the hole of the splitting groove corresponding to the selected cavity to block the connection between the nozzle and the unselected cavity, and then used a second insert is embedded in the hole of the splitting groove corresponding to the selected cavity to communicate the nozzle with the selected cavity; if not, the second insert is directly embedded into the corresponding cavity of the selected cavity The cavity of the groove is connected to the nozzle and the selected cavity; the first die and the second die are combined, and the selected cavity is injection molded through the nozzle and the flow channel. The molding method of claim 7, wherein when the first cavity and the second cavity have the same shape, the first cavity and the second cavity are simultaneously selected for molding, the When the shape of one cavity and the second cavity are different, the first cavity or the second cavity may be selected for molding. The molding method of claim 7, wherein the cross-sectional shapes of the first and second shunt passages are all semi-circular, and the first and second cavities respectively comprise a first and a second one a cylindrical portion communicating with the dividing passage, wherein the diameter of the cylindrical portion is equal to the diameter of the first dividing passage, the first insert comprises a first cylindrical body, and a first cylindrical body a first protrusion protruding outwardly and having a semi-circular cross-sectional shape, the first cylindrical body mating with a cylindrical portion of the first cavity, and one of the first cylindrical bodies is partially protruded from The first cavity, the radius of the first protrusion and the second point The radius of the flow channel is equal, the stop portion of the first insert includes a portion of the first cylindrical body and the first protrusion, and the second insert includes a second cylinder that is completely embedded in the second hole The shaped body is formed at one end of the second cylindrical body. The molding method of claim 9, wherein the first and second cavities further comprise a square portion connected to the cylindrical portion, and the first cylinder of the first insert member The other end of the second cylindrical body of the shaped body and the second insert further has a square second protrusion.