JP2000167888A - Apparatus for taking out molded article - Google Patents

Abstract

PROBLEM TO BE SOLVED: To effectively hold and take out a molded article from a mold for molding with a gate cutting mechanism with an annular material passage at an outer peripheral side of an annular product cavity. SOLUTION: A holder 61 for holding molded articles 3A, 22A when taken out has a first insert 66 to be inserted into an annular part 23A of a runner molded article 22A solidified in a runner. A second inset 67 to be inserted into a product molded article 3A solidified in a product cavity is projected from an end face of the insert 66. An annular sucking surface 68 for vacuum sucking the molded article 3A is formed at an outer peripheral side of the insert 67 at a front end face of the insert 66 of the holder 61. An annular vacuum sucking hole 72 formed over the entire periphery is opened at the surface 68.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a molded product removal apparatus used for removing a molded product from a molding die by injection molding of a synthetic resin or the like, and particularly to a molded product solidified in a product cavity, that is, a product. The present invention relates to a molded product take-out device used for a molding die having a gate cutting mechanism for mutually cutting a molded product solidified in a material passage.

[0002]

For example, in injection molding of a synthetic resin, a fixed mold and a movable mold which are molds of a molding die are closed, and a product shape is formed between the fixed mold and the movable mold. A product cavity is formed, and a molding material such as a molten thermoplastic resin is filled into the product cavity from a material passage formed in the fixed mold or between the fixed mold and the movable mold, and the resin filled in the product cavity is filled. After solidification, the fixed mold and the movable mold are opened, and a molded product (product molded product) solidified in the product cavity is taken out. As a method of removing the molded product, a molded product is released by a protruding mechanism provided on a movable die or the like with the opening of the mold, and the molded product is naturally dropped as it is, or a vacuum suction type removal device for the released molded product. And a method of holding and taking out.

Further, as described in, for example, Japanese Patent Application Laid-Open No. 9-39050, a molding machine having a gate cutting mechanism for mutually cutting resin in a product cavity and resin in a material passage in a mold. Molds are also known. When the resin in the material passage is also solidified in this type of molding die,
The molded product which has solidified in the product cavity and the molded product which has solidified in the material channel must be removed. In the molding die described in Japanese Patent Application Laid-Open No. 9-39050, for the purpose of enhancing the dimensional accuracy of a product molded product, the end of the resin passage on the product cavity side surrounds the annular product cavity. Therefore, it is difficult to hold the molded product solidified in the product cavity by the take-out device because the annular portion becomes an obstacle. This is particularly difficult when the product is small.

Therefore, conventionally, without using a take-out device,
Both the molded product solidified in the product cavity and the molded product solidified in the material passage are naturally dropped when the mold is opened, and then the product molded product solidified in the product cavity and the molded product solidified in the material passage are separated. Like that. However, it takes time and labor to perform such sorting, and the productivity is poor. In particular, when it is necessary to pack a predetermined number of product molded products, it is difficult to automate the operation, and the productivity is further reduced. Further, there is a possibility that the product molded product is damaged by the drop.

Further, as described above, in the case where the product molded product is of a small annular shape and has an annular material passage on the outer peripheral side, as a means for holding the product molded product at the time of removal from the molding die. It is difficult to hold the product molded product from the outer periphery because the material passage is in the way, and the product molded product is small, and the product molded product can be held from the inner peripheral side by the openable chuck. Because of the difficulty, only vacuum suction of the end face of the product molded article can be considered. However, if the product molding is annular, the contact area between the product molding and the suction surface of the take-out device cannot be increased, and the product molding cannot be securely held. May fall off. In particular, the surface of the product molded product, even on a surface that should be flat, causes a slight but concave curvature due to shrinkage due to cooling of the resin, and it is difficult to completely adhere the product molded product and the adsorption surface, Even more so.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and it is a first object of the present invention to provide a molded article removing apparatus capable of securely holding and removing an annular molded article.
The purpose of. It is a second object of the present invention to provide a molded product removal device capable of securely holding and removing a molded product from a molding die having an annular material passage on the outer peripheral side of an annular product cavity.

[0007]

According to a first aspect of the present invention, there is provided a molded product taking-out apparatus, comprising: an annular product cavity between a plurality of molds which are opened and closed with each other;
Forming a material passage leading to the product cavity, and solidifying the molding material in the product cavity from a molding die having a gate cutting mechanism for cutting the molding material at a gate from the material passage to the product cavity. In the molded product taking-out apparatus for holding and removing the molded product formed by the holding body, the holding body is positioned on an outer peripheral side of the insertion portion inserted into the molded product solidified in the product cavity. An annular suction surface for vacuum-sucking the molded product solidified in the product cavity, and a vacuum suction hole opened in the suction surface is formed in an annular shape over the entire circumference of the suction surface.

In molding, a molding material is first filled from a material passage into a product cavity formed between closed molds. Next, the molding material is cut by the gate from the material passage to the product cavity by the gate cutting mechanism, and after the molding material filled in the product cavity is solidified, the mold is opened and the product is opened in the product cavity. A molded product (product molded product) obtained by solidifying the molding material is taken out by a take-out device. At this time, the insertion portion of the holder of the take-out device is inserted into the annular product molded product, and the annular suction surface of the holder vacuum-suctions and holds the product molded product. Further, since the vacuum suction holes that open to the suction surface are formed in an annular shape over the entire circumference of the suction surface, the number of portions where vacuum suction works effectively in the product molded product increases, and the product molded product is securely held. .

[0009] The molded product take-out device of the invention of claim 2 is
In order to achieve the second object, an annular product cavity is formed between a plurality of molds that open and close to each other, and a material passage communicating with the product cavity via an annular portion located on the outer peripheral side thereof, From a molding die provided with a gate cutting mechanism for cutting a molding material at a gate from the annular portion of the material passage to the product cavity, a molded product obtained by solidifying the molding material in the product cavity and the material passage from a molding die is held. In the molded product taking out apparatus which is held and taken out by the above, the holding body has a first insertion portion inserted into a molded product solidified in the annular portion of the material passage, and a protruding end face of the first insertion portion. A second insertion portion that is provided and inserted into a molded product solidified in the product cavity; and a second insertion portion that is located on a distal end surface of the first insertion portion on an outer peripheral side of the second insertion portion. Solid Was molded article is one having a suction surface of the annular vacuum suction.

At the time of molding, first, a molding material is filled into a product cavity formed between closed molds from a material passage through an annular portion and a gate. Next, the molding material is cut by the gate from the material passage to the product cavity by the gate cutting mechanism, and after the molding material filled in the product cavity is solidified, the mold is opened and the product is opened in the product cavity. A molded product (product molded product) obtained by solidifying the molding material and a molded product obtained by solidifying the molding material in the material passage are taken out by a take-out device. At this time, the first insertion portion of the holder of the take-out device is inserted into the annular portion of the molded product obtained by solidifying the molding material in the material passage, and the second insertion portion of the holder is inserted into the annular portion. While being inserted into the annular product molded product located on the peripheral side, the annular suction surface of the holding body vacuum-suctions and holds the product molded product.

According to a third aspect of the present invention, in the molded product removing apparatus according to the second aspect of the present invention, a vacuum suction hole formed in the suction surface is formed in a ring shape over the entire circumference of the suction surface.

As a result, there are many portions where the vacuum suction effectively acts in the product molded product, and the product molded product is securely held.

According to a fourth aspect of the present invention, in the molded product take-out apparatus according to any one of the first to third aspects of the present invention, an uneven portion is formed on the suction surface.

[0014] Of the concave and convex portions, the convex portion corresponds to a product molded product,
The recess creates a negative pressure condition with the product molding. As a result, the area of the product molded product where negative pressure acts is increased, and the product molded product is more reliably held.

According to a fifth aspect of the present invention, in the molded article removing apparatus according to any one of the first to fourth aspects of the present invention, a resin coating is formed on the surface of the suction surface.

For example, even when the material of the main body of the holding member is stainless steel and the material of the molded product is resin, the adhesion between the suction surface of the holding member and the molded product is improved by the resin coating, The product molding is more reliably retained.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a first embodiment of a molded article removing apparatus according to the present invention will be described with reference to FIGS. First, the configuration of a molding die in which a molded product removal device is used will be described. This molding die is for in-mold measurement compression molding, which is a kind of injection compression molding of a thermoplastic resin such as nylon, and is a cold runner type.

In FIG. 5, 1 is a fixed type, 2 is a movable type, and these fixed type 1 and movable type 2
In the figure, the mold is moved in the left-right direction (the mold opening / closing direction A) to open and close each other, and when the mold is closed, a plurality of annular product cavities 3 having a product shape are formed therebetween. The fixed type 1
A fixed-side mounting plate 6 attached to a fixed-side platen of an injection molding machine (not shown);
And a fixed-side receiving plate 7 fixed to the surface of the movable mold 2 on the side of.

On the movable die 2 side of the fixed die base 8 composed of the fixed mounting plate 6 and the fixed receiving plate 7, a moving plate 9 as a moving body is mounted so as to be movable within a predetermined range in the mold opening / closing direction A. ing. Reference numeral 10 denotes a stopper for preventing the movable plate 9 from coming off the fixed base 8. And
The movable plate 9 is urged toward the movable mold 2 toward the fixed base 8 by a spring 11 as urging means mounted between the movable plate 9 and the fixed base 8. In other words, in addition to the first parting line PL1 between the movable plate 9 and the movable mold 2, the final molding die has a second parting line PL2 between the fixed mold base 8 and the movable plate 9. have.

A locating ring 16 and a sprue bush 18 to which a nozzle 17 of an injection molding machine is connected are fixed to the fixed side mounting plate 6. The sprue bush 18 forms a sprue 19 whose inside is a material passage. Then, the sprue bush 18 penetrates the fixed-side receiving plate 7 and further slidably penetrates the moving plate 9, and the tip end surface is exposed to the movable mold 2 side. In addition, the fixed base 8 includes
A tubular fixed-side insert 21 is fixed between the fixed-side mounting plate 6 and the fixed-side receiving plate 7. The fixed nest 21 penetrates the movable plate 9 so as to be slidable, and has a tip end exposed to the movable mold 2 side.

The product cavity 3 is basically formed between the fixed nest 21 and the movable mold 2 which are closed to each other. On the other hand, between the movable plate 9 and the movable mold 2 which are closed to each other, a runner 22 which is a material passage for branching the sprue 19 into a plurality of product cavities 3 is formed. The runner 22 has an annular portion 23 surrounding each product cavity 3 from the outer peripheral side. Also, with the movable plate 9 and the movable die 2 closed and the fixed die base 8 and the movable plate 9 slightly open, each annular portion 23 of the runner 22 is placed between the fixed side insert 21 and the movable die 2. An annular gate 24 is formed so as to communicate with the product cavities 3.

The movable mold 2 includes a movable mounting plate 31 mounted on a movable platen of an injection molding machine (not shown).
And a movable-side receiving plate 33 fixed via a spacer block 32 to a surface of the movable-side mounting plate 31 on the fixed mold 1 side.
And a movable mold plate 34 fixed to the surface of the movable mold plate 33 on the fixed mold 1 side.

As shown in FIGS. 6 to 8, a hole for forming the outer peripheral surface of the annular product cavity 3 is formed in a movable block 35 embedded and fixed in the movable mold plate 34. 36 are formed. The hole 36 is formed so that the fixed side insert 21 forming one end surface of the product cavity 3 is slidably fitted when the mold is closed.
Together with 21, the gate 24 forms a gate cutting mechanism for cutting the resin as the molding material in the runner 22 and the resin in the product cavity 3, that is, the product. Further, a pin-shaped movable nest 21 is fixed to the movable block 35. The movable insert 21 has an annular step 38 facing the fixed mold 1 side and a convex section 39 protruding from the step face 38 to the fixed mold 1 side. Of the product cavity 3 by the convex portion 39.
Are formed. When the mold is closed,
39 fits inside the cylindrical fixed side insert 21.

Further, a protruding plate 41 is provided between the movable mold mounting plate 31 and the movable-side receiving plate 33 so as to be movable within a predetermined range in the mold opening / closing direction A. One end of a product protruding pin 42 and runner protruding pins 43, 44 are fixed to the protruding plate 41, and these protruding pins 42, 43, 44
Slidably penetrates the movable-side receiving plate 33 and the movable-side block 35 or the movable-side inserts 37, and the tip is exposed to the surface of the movable mold 2 on the fixed mold 1 side. The product ejection pin 42 is for ejecting a molded product 3A in which the resin is solidified in the product cavity 3, that is, the product, and releasing the product from the movable mold 2. On the other hand, runner protruding pins 43 and 44
Is for projecting a runner part molded product 22A obtained by solidifying the resin in the sprue 19 and the runner 22, and releasing the molded product from the movable mold 2. In addition, a runner lock portion 45 formed of an inversely tapered concave portion is formed in a portion of the movable block 35 where the runner 22 is formed. FIG.
In the drawings including, the respective parts of the molded products 3A and 22A are denoted by reference numerals with the suffix A added to the reference numerals of the corresponding parts in the mold.

Next, the molded products 3A, 22
A molded product take-out apparatus for automatically taking out A will be described. FIG. 9 schematically shows a take-out device. In the figure, reference numeral 51 denotes a runner housing, and 52 denotes a product housing. The runner housing 51, the product housing 52, and the molding die are located along a horizontal straight line.
Above the molding die, the runner housing section 51 and the product housing section 52, a horizontal rail 53 is arranged in parallel with their arrangement.
The horizontal slide 54 is slidably supported by the horizontal rail 53. Also, this horizontal slide 54
A vertical slide body 55 is supported so as to be able to move up and down, and a transport body 56 is rotatably supported at the lower end of the vertical slide body 55. The transfer body 56 includes a runner part molded product 22.
An openable and closable chuck 57 for holding A by a sprue portion 19A is provided, and an annular product molded product 3A formed by solidifying resin in each product cavity 3 of the molding die, and a runner A plurality of holders 61 that also hold the part molded product 22A are provided.

FIG. 9 shows a plurality of carriers 56, but this is for the purpose of explanation, and there is actually only one carrier 56.

Next, the structure of the holding body 61 will be described with reference to FIGS. The holder 61 includes a holder base 62 and a holder insert 63 made of stainless steel or the like. These holder bases
Both 62 and the holder insert 63 are substantially cylindrical. The holder base portion 62 has a concave portion 64 opened at the front end surface thereof.
The holder insert 63 is fitted in the recess 64. The holder insert 63 is fixed to the holder base 62 by bolts 65. On the other hand, the holder base
A screw hole 62a for attachment to the carrier 56 is provided at the rear of
Are formed.

Further, a first insertion portion 66 formed of a columnar projection is formed at the center of the front end face of the holder base portion 62. The first insertion portion 66 is a runner part molded product 22A.
Is inserted into the annular portion 23. On the other hand, at the center of the front end face of the holder insert 63, a second insertion portion 67 formed of a columnar projection is formed. This second insertion portion 67
Is inserted into the annular product molded product 3A.
An annular suction surface 68 is formed by the step surface on the outer peripheral side of the second insertion portion 67 of the holder insert 63 and the front end surface of the first insertion portion 66 of the holder base portion 62. The suction surface 68 is formed of a single plane orthogonal to the axial direction of the insertion portions 66 and 67, and is used for vacuum suction of the product molded product 3A.

The retainer insert 63 is fitted into the concave portion 64 of the retainer base portion 62 with almost no gap at the rear portion, but the inner peripheral surface of the concave portion 64 and the outer peripheral portion of the retainer insert 63 are fitted at the front side. A gap 71 that forms an air passage over the entire circumference is formed between the gap 71 and the surface. The gap 71 is open to the suction surface 68, and the opening forms an annular slit-shaped vacuum suction hole 72 over the entire circumference of the suction surface 68. The vacuum suction holes 72 are narrowed by annular projections 73 formed on the outer peripheral surface of the holder insert 63. For example, while the width of the annular product molded product 3A is about 2 mm, the vacuum suction hole
The width of 72 is about 0.3 mm. A connection hole 74 communicating with the gap 71 is formed in a side portion of the holder base 62. The connection hole 74 is screwed with a joint for connecting to a pump 75 for vacuum suction. The negative pressure generated by this is -0.6 bar, for example.

Further, as shown in FIG.
Are formed with a large number of concave and convex portions 76 and convex portions 77 forming an uneven portion. When manufacturing the holding body 61, the suction surface 68 is polished with a jig grinder or the like in order to secure dimensional accuracy and prevent air leakage.However, the suction surface 68 is further blasted to roughen the suction surface 68 to, for example, about 20 μm. The irregularities are formed by forming the surface. The means for roughening the suction surface 68 is not limited to blasting, but may use electric discharge machining or the like. The electric discharge machining is more advantageous than the blast in that the surface roughness can be made constant. In addition, a resin coating 78 is formed on the surface of the suction surface 68. This coating 78
For example, it is formed by applying a paint, but may be formed by applying a resin coating by other means. For example, a fluororesin coating can be used. In FIG. 2, the concave portion 76, the convex portion 77, and the coating 78 are schematically exaggerated for easy understanding.

Next, the operation of the above configuration will be described. First, the in-mold measuring compression molding performed by the molding die will be described. In this in-mold measuring compression molding, it is necessary that the mold clamping force of the mold clamping device of the injection molding machine can be adjusted in at least two stages. At the time of molding, first, the fixed mold 1 and the movable mold 2 are closed with a weak clamping force by a mold clamping device.
In this state, the movable plate 9 on the fixed die 1 side and the movable die 2
Is closed at the parting line PL1, and a runner 22 and a product cavity 3 are formed between the movable plate 9 and the fixed side insert 21 and the movable die 2 on the fixed die 1 side.
The movable plate 9 and the fixed base 8 are slightly opened by the force of (1). Then, as shown in FIG.
Is not fitted in the hole 36 of the movable mold 2 and is an open gate.
24 allows the runner 22 to communicate with the product cavity 3. In this state, the sprue 19 is
Inject molten thermoplastic resin into This resin is filled into the product cavity 3 from the sprue 19 through the runner 22, its annular portion 23 and the annular gate 24 (filling step).

When the resin is filled in the mold as described above,
Due to the resin pressure in the mold, the movable mold 2 is appropriately retracted in a direction away from the fixed mold 1. The amount of retreat is determined by the balance between the resin pressure, the mold clamping force, and the force of the spring 11. And
When the movable mold 2 is retracted in this manner, variations in the amount of resin injected from the injection molding machine and the like are absorbed, and the pressure of the resin in the product cavity 3 is substantially constant and uniform. Pressure step).

Next, the clamping force of the clamping device is increased. Thereby, as shown in FIGS. 5 and 7, the movable plate 9 and the fixed base 8 close at the second parting line PL2 against the force of the spring 11. In the first half of this process,
The gate in which the resin in the product cavity 3 is still open by the advance of the fixed side insert 21 toward the movable mold 2.
Returning from 24 to the runner 22, the resin in the molding die returns to the injection molding machine side. Then, as shown by a chain line in FIG. 6, the gate 24 closes when the fixed side insert 21 starts to be fitted into the hole 36 of the movable mold 2, and at this time, a certain amount of resin remains in the product cavity 3 ( Weighing process). Thereafter, the resin in the product cavity 3 is compressed as the fixed side insert 21 enters the hole 36 of the movable mold 2 (compression step). By closing the gate 24 as described above, the resin in the runner 22 and the resin in the product cavity 3 are cut at the gate 24.

After the resin in the molding die including the product cavity 3 is cooled and solidified, the fixed die 1 and the movable die 2 are opened, and the molded products 3A, 2 are formed by the molded product take-out device.
2A is taken out. Thereafter, the mold is closed again, and the above molding steps are repeated. According to the in-mold measurement compression molding including the pressure adjustment step, the measurement step, and the compression step as described above, a highly accurate product molded product 3A can be obtained. The annular portion 23 of the runner 22 smoothes the flow of the resin between the product cavity 3 and the runner 22 and uniformly fills the resin into the product cavity 3 to improve the molding accuracy of the product molded product 3A. It is to enhance.

Next, removal of the molded products 3A and 22A by the molded product removal device will be described. When the fixed mold 1 and the movable mold 2 are opened as described above, the runner lock section
Since the release resistance of the movable mold 2 side is larger than that of the fixed mold 1 side due to 45, the sprue 19 and the runner
Runner part molded product 22A in which resin is solidified in 22 and product molded product 3A in which resin is solidified in product cavity 3
First move away from the fixed mold 1 and stay on the movable mold 2 side.

As shown in FIG. 9 (A), the carrier 56 of the molded product take-out device descends as the mold is opened, and enters between the fixed mold 1 and the movable mold 2. At this time, the transport body 56 faces the movable mold 2 with the surface of the holding body 61 facing sideways, and each holding body 61 corresponds to each of the annular portion 23A of the runner part molded product 22A and each of the product molded products 3A. opposite.

Next, as the protruding pins 42, 43, and 44 advance together with the protruding plate 41 toward the fixed mold 1, the molded products 3A and 22A are protruded to move the movable mold 2 as shown in FIGS. Move away from Then, the first insertion portion 6 of each holder 61
6 is inserted into each annular portion 23A of the runner portion molded product 22A, and the second insertion portion 67 is inserted into each annular product molded product 3A located on the inner peripheral side of each annular portion 23A. Is done. At the same time, the chuck 57 of the carrier 56 closes to hold the sprue portion 19A of the runner part molded product 22A.
In addition, vacuum suction is performed in the vacuum suction hole 72 by driving the pump 75, and the product molded product 3A is sucked and held on the suction surface 68 of the holding body 61.

In this way, the molded articles 3A and 22A are
Then, as shown in FIG. 9B, the transport body 56 moves up together with the vertical slide body 55, and the fixed mold 1 and the movable mold 2 are moved.
Get out of between. Thereafter, the molding die is closed and the molding is performed. On the other hand, as shown in FIG. 9C, the transport body 56 moves together with the horizontal slide body 54 and is located above the runner accommodating section 51, and is further rotated by 90 ° so that the surface on which the holding body 61 is located becomes Turn downward. Here, the chuck 57 is opened and the holding of the runner part molded product 22A is released,
The runner part molded product 22A is moved by the carrier 5 as shown by the arrow B.
It falls from 6 and is stored in the runner storage section 51. In addition,
At this time, the product molded product 3A is still vacuum-sucked on the suction surface 68 of the holder 61 and does not drop.

Next, as shown in FIG. 9D, the transport body 56 moves together with the horizontal slide body 54, descends further, and is located near the upper part of the product storage section 52. Here, the vacuum suction on the product molded product 3A is released, and the product molded product 3A falls from the holding body 61 as shown by the arrow C and is stored in the product storage part 52.

After that, the carrier 56 moves and rotates to go to the molding die again for taking the products 3A and 22A.

According to the configuration of the above-described embodiment, the first insertion portion 66, the second insertion portion 67, and the suction surface 68 are formed on the holder 61 of the molded product removal device, and the first insertion portion 66 is formed. Insert the second insertion portion 67 into the annular portion 23A of the runner portion molded product 22A, and insert the second insertion portion 67 into the annular portion 23A.
A is inserted into the annular product molded product 3A located on the inner peripheral side of A, and the product molded product 3A is vacuum-adsorbed on the annular suction surface 68 between both the insertion portions 66 and 67. In the mold, an annular portion of the runner 22 is provided on the outer peripheral side of the product cavity 3.
23, the resin in the product cavity 3 and the resin in the runner 22 are cut off from each other in the molding die, but the annular portion 23A is solidified in the product cavity 3 without hindrance. The product molded product 3A can also be securely held and taken out, and both the product molded product 3A and the runner part molded product 22A can be securely held and taken out. The removal of the molded products 3A and 22A can be automated by the molded product removal device in this manner, so that the molded products 3A and 22A can be removed.
Automatic sorting and automatic packaging are also possible, greatly improving productivity. In addition, especially the product molded product 3A without impact
By being accommodated in 51, damage to the product molded product 3A can be prevented.

Further, since the vacuum suction holes 72 are formed in an annular shape over the entire circumference on the annular suction surface 68 of the holding body 61, compared with the case where a plurality of small vacuum suction holes are provided separately. By increasing the portion where vacuum suction effectively acts on the product molded product 3A, the annular product molded product 3A can be held more reliably.

Also, the suction surface 68 of the holding body 61 is roughened,
By forming a large number of concave portions 76 and convex portions 77 on the suction surface 68, the following effects can be obtained. That is, during vacuum suction, the convex portion 77 of the concave portion 76 and the convex portion 77 corresponds to the product molded product 3A, and the concave portion 76 generates a negative pressure state with the product molded product 3A. As a result, the area where the negative pressure acts on the product molded product 3A increases, and the product molded product 3A is more reliably held.

Further, although slippage is likely to occur between stainless steel and a resin such as nylon, the material of the main body of the holding body 61 is stainless steel because the coating 78 made of resin is formed on the suction surface 68 of the holding body 61. In spite of the fact that the material of the molded product 3A is a resin such as nylon, since the material of the suction surface 68 of the holder 61 and the material of the molded product 3A are close to each other, the adhesion between the adsorption surface 68 and the molded product 3A is improved. It is possible to more reliably hold the molded product 3A. When the adsorption force was measured, the adsorption force was more than doubled as compared with the case where the coating 78 was not provided. In addition, as the use of the holder 61 overlaps, the covering 78 formed on the convex portion 77 is used.
Is not worn out, but a sufficient effect can be obtained only by the coating 78 remaining in the concave portion 76.

FIG. 10 shows a second embodiment of the molded article removing apparatus according to the present invention. Parts corresponding to those in the first embodiment are denoted by the same reference numerals, and description thereof is omitted. In the second embodiment, convex portions 81 of the concave and convex portions are formed in an annular shape on the inner peripheral portion and the outer peripheral portion of the suction surface 68 of the holding body 61, and an annular concave portion 82 is formed between these convex portions 81. It is formed. The two convex portions 81 are located on the same plane orthogonal to the axial direction of the insertion portions 66 and 67. In addition, an annular vacuum suction hole 72
Is open on the bottom surface of the concave portion 82.

In the second embodiment, the molded product 3A is placed on the suction surface.
When adsorbed and held on 68, the convex portion 81 hits the product molded product 3A, and the concave portion 82 located between both convex portions 81 becomes a closed space. Since the vacuum suction holes 72 are opened in the concave portions 82, the inside of the concave portions 82 is surely in a negative pressure state.
As a result, the area on which the negative pressure acts increases, and the product molded product 3A is more reliably held.

It should be noted that the present invention is not limited to the above embodiment, and various modifications can be made. For example,
In the above embodiment, the product cavity 3 and the annular portion 23 of the runner 22 are annular. However, the annular portion of the product cavity and the runner is not limited to an annular shape, but may be an annular shape such as a square or an ellipse. There may be. Further, the operation of the transport body 56 is not limited to that of the above-described embodiment, and various modifications can be made.

[0048]

According to the molded product take-out apparatus of the first aspect of the present invention, the holder for holding the molded product solidified in the annular product cavity has the insertion portion inserted into the annular molded product, It has an annular suction surface that is located on the outer peripheral side of the insertion part and vacuum-suctions the molded product. The vacuum suction hole that opens to this suction surface is formed in a ring shape over the entire circumference of the suction surface, so that the The product can be securely held and taken out.

According to the molded product take-out apparatus of the second aspect of the present invention, the annular product cavity has a material passage communicating with the annular portion located on the outer peripheral side of the annular product cavity, and from the annular portion of the material passage to the product cavity. In a molded product taking-out apparatus, a molded product obtained by solidifying the molded material in a product cavity and a material passage is held and taken out by a holding body from a molding die having a gate cutting mechanism for cutting the molding material at a gate. The body is inserted into a molded part solidified in a product cavity, which is inserted into a molded part solidified in the annular part of the material passage, and is protruded from a distal end surface of the first inserted part and solidified in the product cavity. A second insertion portion, and an annular suction surface which is located on the outer peripheral side of the second insertion portion at the distal end surface of the first insertion portion and vacuum-adsorbs a molded product solidified in the product cavity.
Despite the annular portion of the material passage on the outer peripheral side of the product cavity, both the annular molded product solidified in the product cavity and the molded product solidified in the material passage can be reliably held and taken out. .

According to the molded product take-out apparatus of the third aspect of the invention, in addition to the effect of the second aspect of the invention, the vacuum suction hole opened on the suction surface is formed in a ring shape over the entire circumference of the suction surface. Further, the annular molded product solidified in the product cavity can be more reliably held and taken out.

According to the molded article take-out apparatus of the invention of claim 4, in addition to the effect of any of the inventions of claims 1 to 3,
Since the concave and convex portions are formed on the suction surface, the area where the negative pressure acts on the product is increased, so that the molded product can be more reliably held and taken out.

According to the molded article take-out apparatus of the fifth aspect of the present invention, in addition to the effects of any one of the first to fourth aspects,
Since the resin coating is formed on the surface of the suction surface, the adhesion between the suction surface and the molded product is improved, so that the molded product can be more securely held and taken out.

[Brief description of the drawings]

FIG. 1 is a sectional view of a holder showing a first embodiment of a molded article take-out apparatus of the present invention.

FIG. 2 is an enlarged sectional view of a part of the holder.

FIG. 3 is a perspective view of the holder.

FIG. 4 is a perspective view of the molded article.

FIG. 5 is a cross-sectional view of the entire molding die.

FIG. 6 is a cross-sectional view of the entire molding die, showing a state before gate cutting.

FIG. 7 is a cross-sectional view of the entire molding die, showing the time of completion of mold clamping.

FIG. 8 is a cross-sectional view of the entire molding die, showing a state where a molded product is taken out.

FIG. 9 is an explanatory view schematically showing an operation of the molded article take-out apparatus.

FIG. 10 is a sectional view of a holder showing a second embodiment of the molded product take-out apparatus of the present invention.

[Explanation of symbols]

 Reference Signs List 1 fixed mold (mold) 2 movable mold (mold) 3 product cavity 3A product molded product (molded product) 22 runner (material passage) 22A runner part molded product (molded product) 23 annular portion 24 gate 61 holder 61 Insertion part 1 67 Second insertion part 68 Suction surface 72 Vacuum suction hole 76 Concave part (irregular part) 77 Convex part (irregular part) 78 Coating 81 convex part (irregular part) 82 concave part (irregular part)

Claims (5)

[Claims] 1. A gate for forming an annular product cavity between a plurality of molds that open and close to each other and a material passage communicating with the product cavity, and cutting a molding material at a gate from the material passage to the product cavity. In a molded product taking-out apparatus for holding and taking out a molded product obtained by solidifying a molding material in the product cavity from a molding die having a cutting mechanism by a holding body, the holding body is solidified in the product cavity. An insertion portion to be inserted into the molded product; and an annular suction surface located on an outer peripheral side of the insertion portion and vacuum-sucking the molded product solidified in the product cavity, and a vacuum suction opening to the suction surface. A molded product removal device, wherein the holes are formed in a ring shape over the entire circumference of the suction surface. 2. An annular product cavity is formed between a plurality of molds that open and close to each other, and a material passage communicating with the product cavity via an annular portion located on an outer peripheral side of the product cavity. From a molding die equipped with a gate cutting mechanism for cutting a molding material at a gate from the gate to the product cavity from which the molding material solidified in the product cavity and the material passage is held by a holding body and taken out. In the article take-out device, the holding body is
A first insertion portion inserted into the molded product solidified in the annular portion of the material passage; and a first insertion portion protruding from a distal end surface of the first insertion portion and inserted into the molded product solidified in the product cavity. A second insertion portion, and an annular suction surface which is located at a distal end surface of the first insertion portion on an outer peripheral side of the second insertion portion and vacuum-adsorbs a molded product solidified in the product cavity. A molded product take-out device. 3. The molded product take-out apparatus according to claim 2, wherein a vacuum suction hole opened in the suction surface is formed in an annular shape over the entire circumference of the suction surface. 4. The molded product take-out apparatus according to claim 1, wherein an uneven portion is formed on the suction surface. 5. The molded product take-out apparatus according to claim 1, wherein a resin coating is molded on the surface of the suction surface.