JP3701575B2 - Blow molding equipment - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a blow molding apparatus, and more particularly to a blow molding apparatus that holds a preform on a conveying member, circulates and conveys it, heats it, and performs blow molding.
[0002]
[Background Art and Problems to be Solved by the Invention]
As a blow molding apparatus, for example, an apparatus is known in which a neck portion of a preform is held on a conveying member and circulated and conveyed, and the preform is heated by a heating unit during conveyance and then blow-molded by a blow molding unit.
[0003]
In such a blow molding apparatus, when space saving is pursued, the number of conveying members in a space where no processing is performed is reduced.
[0004]
When continuous operation is performed in such a state, the conveying member is heated together with the preform in the heating unit, and the temperature of the conveying member is increased.
[0005]
When the temperature of the conveying member rises, the influence of heat such as deformation of the neck portion of the preform held by the conveying member due to heat will occur.
[0006]
The objective of this invention is providing the blow molding apparatus which can cool a conveyance member efficiently, without affecting other operations.
[0007]
[Means for Solving the Problems]
In order to achieve the above object, the blow molding apparatus of the present invention is a blow molding apparatus for performing blow molding after heating a preform to a temperature equal to or higher than a blow molding temperature.
A plurality of conveying members that convey while holding the preform;
Anda endless conveying unit for circulating conveying the conveying member,
Along the transport section,
A preform supply unit for supplying the preform to the conveying member;
A heating section for heating the preform to a temperature equal to or higher than the blow molding temperature;
A blow molding part that blow-molds the preform heated in the heating part into a product shape;
A product take-out section for taking out the blow-molded product, and in order,
Wherein the transport unit may have a cooling unit for further cooling by blowing air in conveying member,
The cooling unit is arranged between the blow molding unit and an upstream end of the heating unit in the conveyance direction of the preform .
[0009]
According to the present invention, the conveying member can be efficiently cooled by blowing the cooling air to the conveying member and cooling the conveying member by the cooling unit disposed in the conveying unit.
[0010]
In particular, by cooling the conveyance member between the blow molding part and the heating part, the conveyance member can be cooled without affecting the preform temperature in the heating or blow molding part.
[0011]
Therefore, even if the blow molding apparatus is reduced in space, it is possible to prevent the influence of heat such as deformation of the neck portion of the preform.
[0012]
The blow molding apparatus of the present invention is a blow molding apparatus for performing blow molding after heating the preform to a temperature equal to or higher than the blow molding temperature.
A plurality of conveying members that convey while holding the preform;
An endless transport section for circulating and transporting the transport member,
Along the transport section,
A preform supply unit for supplying the preform to the conveying member;
A heating section for heating the preform to a temperature equal to or higher than the blow molding temperature;
A blow molding part that blow-molds the preform heated in the heating part into a product shape;
A product take-out section for taking out the blow-molded product, and in order,
The transport unit further includes a cooling unit for cooling the transport member by spraying air,
Stop of the conveying member is provided between the product take-out portion and the preform supply portion,
The cooling unit is characterized by blowing cooling air to the conveying member having stopped the stop position.
[0013]
By having such a configuration, a stop part of the transport member is provided between the product take-out part and the preform supply part, and by cooling the transport member at this stop part, there is no product or preform. The preform holding portion of the conveying member can be reliably cooled.
[0014]
In the present invention, the cooling unit includes a cooling device having a fan that blows cooling air, and a cooling duct box provided with a plurality of outlets that guide the cooling air to the plurality of conveying members and blow the cooling air to the conveying members. Can be.
[0015]
By adopting such a configuration, the cooling air sent from the fan can be reliably guided to the respective conveying members by the cooling duct box and can be efficiently cooled.
[0016]
In the present invention, the conveying member has a placement table for placing the preform,
The mounting table can be made to have a slit to increase the cooling efficiency.
You can.
[0017]
By setting it as such a structure, the surface area of a mounting base can be enlarged and cooling efficiency can be improved.
[0018]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
[0019]
1 and 2 are diagrams showing a blow molding apparatus according to an embodiment of the present invention.
[0020]
As shown in FIG. 1, the blow molding device 10 includes a preform supply unit 14, a heating unit 16, a blow molding unit 18, and a product takeout unit 20 on an endless conveying unit 22 on a machine base 12. It is the state arrange | positioned along.
[0021]
The conveyance unit 22 forms a substantially rectangular conveyance path, the blow molding unit 18 is disposed on one side of the short side of the rectangle, and the other three sides excluding the short side on which the blow molding unit 16 is disposed. A heating unit 16 is provided.
[0022]
Further, of the long side that continues in the conveyance direction A from the short side where the blow molding unit 18 is disposed, the product take-out unit 20 and the heating unit 16 reach the upstream end in the preform conveyance direction from the blow molding unit 18 side. A preform supply unit 14 is arranged side by side.
[0023]
The preform supply unit 14 delivers a preform 24 previously injection-molded elsewhere to the conveyance unit 22, and grips the neck portion of the preform 24 with a pair of chuck mechanisms 26. By the operation, the preform 24 is delivered to the conveying unit 22 in an inverted state with the neck portion thereof being down.
[0024]
The conveyance unit 22 intermittently conveys the preform 24 endlessly from the preform supply unit 14 to the heating unit 16, the blow molding unit 18, and the product take-out unit 20, and includes a conveyance rail 28, a conveyance chain 30, and the like. have.
[0025]
The transport rail 28 is in a state of being disposed along the transport path of the preform 24.
[0026]
The transport chain 30 is wound around four transport sprockets 34 and is movable along the inner chain guide 72 shown in FIG. 2 by driving one of the transport sprockets 34.
[0027]
A plurality of transport members 32 are attached to the transport chain 30.
[0028]
The conveying members 32 are fixed to the conveying chain 30 at a predetermined pitch, for example, two pitches at a predetermined interval at a pitch that matches the interval between the two preforms 24, which is the number of simultaneous blow moldings in this embodiment. It can be moved by driving the chain 30.
[0029]
Further, as shown in FIG. 2, the transport member 32 can roll with respect to the transport rail 28 via a cam follower 35.
[0030]
Further, as shown in FIG. 2, the conveying member 32 has a mounting table 38 that is rotatably attached to a fixed portion 36 fixed to the conveying chain 30, and is formed to protrude from the upper surface of the mounting table 38. A conveying pin 40 is inserted into the neck portion of the product 54 or the preform 24 to support the product 54 or the preform 24 in an inverted state.
[0031]
Further, as shown in FIG. 2, a rotation sprocket 42 is provided on the mounting table 38, and the rotation sprocket 42 is a chain in which the sprocket 44 is wound around three sides where the heating unit 16 is wound. The mounting table 38 rotates within the range of the heating unit 16 by the driving force of the preform rotation motor 45 engaged with the rotation 43, and the preform 24 is rotated.
[0032]
The heating unit 16 is transferred from the preform supply unit 14 to the transport unit 22 and heats the preform 24 transported at a predetermined transport pitch to a temperature equal to or higher than the blow molding temperature. In the present embodiment, four heating units 16 are provided. A heating box 46 is used.
[0033]
In each heating box 46, a plurality of heaters 48 extending in the conveying direction of the preform 24 are arranged in a plurality of stages on one side of the conveying path in the heating box 46, and the heating temperature of each heater 48 is adjusted. Thus, a temperature distribution in the vertical direction is given to the preform 24.
[0034]
The blow molding unit 18 blow-molds the preform 24 heated by the heating unit 16 into a product shape. The blow molding unit 50 is formed by splitting a blow molding die 50 having two mold cavity surfaces. The device 52 can be opened and closed, and the two preforms 24 are simultaneously blow-molded.
[0035]
The product take-out unit 20 takes out the product 54 blow-molded by the blow-molding unit 18 and is disposed beside the preform supply unit 14.
[0036]
In the product take-out unit 20, a pair of chuck mechanisms 56 are provided in the same manner as the preform supply unit 14, and the chuck mechanism 56 grips the neck portion of the inverted product 54 that has been transported via the transport member 32. The reversing operation of the chuck mechanism 56 allows the product 54 to be taken out in an upright state with the neck portion up.
[0037]
A stop 58 of the conveying member 32 is provided between the product take-out unit 20 and the preform supply unit 14, and the two conveying members 32 can stop at the position of the stop 58.
[0038]
A cooling unit 60 that cools the conveying member 32 by blowing cooling air to the conveying member 32 is disposed between the blow molding unit 18 and the upstream end of the heating unit 16 in the conveying direction.
[0039]
Specifically, the cooling unit 60 includes three cooling devices 62 provided at positions corresponding to the product take-out unit 20, the stop unit 58, and the preform supply unit 14, respectively.
[0040]
Each cooling device 62 includes a fan 64 for sending cooling air, and a cooling duct box 66 provided integrally below the fan 64.
[0041]
The cooling duct box 66 has two outlets 68 that open toward the two conveying members 32 stopped at the respective positions of the product take-out unit 20, the stop unit 58, and the preform supply unit 14. Are guided to the two conveying members 32 and sprayed to the conveying members 32.
[0042]
Thus, by disposing the cooling unit between the blow molding unit 18 and the upstream end of the heating unit 16 in the conveying direction, each process in the heating unit 16 and the blow molding unit 18 is not affected. Further, it is possible to prevent the influence of heat such as deformation of the neck portion of the preform 24 accompanying the temperature rise due to overheating of the conveying member 32.
[0043]
In addition, the transport member 32 can be reliably cooled before the preform 24 heated by the heating unit 16 is transported to the heating unit 16 again after blow molding.
[0044]
Furthermore, a stop unit 58 is provided between the product take-out unit 20 and the preform supply unit 14, and the conveyance member 32 is cooled by the stop unit 58, so that the conveyance member 32 is in a state where the product 54 and the preform 24 are not present. In particular, the conveying pin 40 can be reliably cooled.
[0045]
In addition, the cooling air can be reliably guided to the respective conveying members 32 at the respective positions by the cooling duct box 66 to efficiently perform the cooling.
[0046]
Further, since the opening of the cooling duct box is located at a position corresponding to the mounting table 38 in particular, even if the preform 24 and the product 54 are held by the conveying pins 40, the conveying member 32 is effectively cooled. be able to.
[0047]
Further, as shown in FIG. 2, the mounting table 38 has the slit 70 and is formed in a cooling fin shape, so that the conveying member can be cooled more efficiently and the neck portion is prevented from being deformed by heat. be able to.
[0048]
The present invention is not limited to the above-described embodiment, and can be modified into various forms within the scope of the gist of the present invention.
[0049]
For example, in the above-described embodiment, the conveyance member stopping portion is provided between the product take-out portion and the preform supply portion, and the cooling device is also provided there. It is also possible to omit the stop portion of the conveying member according to conditions such as the arrangement state of the supply unit or the number of simultaneous blow moldings.
[0050]
Further, in the above embodiment, a cooling device including a fan and a cooling duct box is disposed in each of the product take-out unit, the stop unit, and the preform supply unit. It is also possible to guide the cooling air to the conveying member at each position using a cooling duct box.
[0051]
Furthermore, although the preform temperature is somewhat affected, a cooling unit may be provided along the heating unit.
[Brief description of the drawings]
FIG. 1 is a plan view showing a blow molding apparatus according to an embodiment of the present invention.
FIG. 2 is a cross-sectional view showing the cooling device of FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 Blow molding apparatus 14 Preform supply part 16 Heating part 18 Blow molding part 20 Product extraction part 22 Conveyance part 24 Preform 32 Conveyance member 54 Product 58 Stop part 60 Cooling part 62 Cooling device 64 Fan 66 Cooling duct box 68 Outlet

Claims (4)

In a blow molding apparatus for blow molding after heating the preform to a temperature equal to or higher than the blow molding temperature,
A plurality of conveying members that convey while holding the preform;
Anda endless conveying unit for circulating conveying the conveying member,
Along the transport section,
A preform supply unit for supplying the preform to the conveying member;
A heating section for heating the preform to a temperature equal to or higher than the blow molding temperature;
A blow molding part that blow-molds the preform heated in the heating part into a product shape;
A product take-out section for taking out the blow-molded product, and in order,
Wherein the transport unit may have a cooling unit for further cooling by blowing air in conveying member,
The said cooling part is arrange | positioned between the said blow molding part and the conveyance direction upstream end part of the said preform of the said heating part, The blow molding apparatus characterized by the above-mentioned. In a blow molding apparatus for blow molding after heating the preform to a temperature equal to or higher than the blow molding temperature,
  A plurality of conveying members that convey while holding the preform;
  An endless transport section for circulating and transporting the transport member,
  Along the transport section,
  A preform supply unit for supplying the preform to the conveying member;
  A heating section for heating the preform to a temperature equal to or higher than the blow molding temperature;
  A blow molding part that blow-molds the preform heated in the heating part into a product shape;
  A product take-out section for taking out the blow-molded product, and in order,
  The transport unit further includes a cooling unit for cooling the transport member by spraying air,
  A stop portion of the conveying member is provided between the product take-out portion and the preform supply portion,
  The blow molding apparatus, wherein the cooling unit blows cooling air onto the conveying member stopped at the stop unit position. In claim 1 or 2 ,
The cooling unit includes a cooling device having a fan for blowing cooling air and a cooling duct box provided with a plurality of outlets for guiding the cooling air to a plurality of conveying members and blowing the cooling air to the conveying members. Blow molding equipment. In any one of Claims 1-3 ,
The transport member has a mounting table for placing a preform;
The mounting table, a blow molding apparatus characterized by having a slit in order to increase the cooling efficiency.

Images