JPH08297347A - Production of constituting parts of film-integrated camera and apparatus therefor as well as constituting parts of film-integrated camera - Google Patents

Abstract

PURPOSE: To decrease shrinks and flashes, to improve the dimensional accuracy and to enable rapid molding at a low cost. by supplying a resin liquid from a hot runner to the part for forming parts shapes and molding the constituting parts specified in size and thickness of the external shape. CONSTITUTION: The part 4 for forming the parts shapes which molds the constituting parts 6 of the film-integrated camera is formed by a stationary mold 2 and a moving mold 3. The part 4 for forming the parts shapes is capable of molding the constituting parts 6 having size of the external shape of <=50×30×30mm and thickness of <=3mm. Needles 51 inserted into the respective nozzle parts 53 of the hot runner 5 disposed at the stationary mold 2 are driven by one air cylinder. The respective needle parts 53 are provided with band heaters 54 and temp. sensors 55 which are respectively independently controlled in temp. The resin liquid is supplied from the nozzles 57 to the part 4 for forming the parts shapes by the actuation of the needles 51. The moving mold 3 is parted from the stationary mold 2 and the constituting parts 6 are pressed by ejector pins 70 and parted from the moving mold 3 when the constituting parts 6 are molded.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and apparatus for manufacturing a component part of a film-integrated camera in which a film cartridge is loaded in advance at the time of assembling, the photographic film is wound up for each photographing, and the photographed film is taken out. Also, the present invention relates to a component part of a film-integrated camera.

[0002]

2. Description of the Related Art A film-integrated camera is a simple camera in which a film cartridge is loaded in advance at the time of assembling, the photographic film is wound up each time a picture is taken, and the taken photographic film is taken out. Some of the components of this film-integrated camera are molded, for example, by supplying a resin liquid from a gate to a component shape forming portion formed of a fixed mold and a movable mold through a passage.

[0003]

As described above, the resin liquid is supplied from the gate to the component shape forming portion formed by the fixed mold and the movable mold through the passage, and the resin liquid is supplied. Takes time to lead to. Further, since the resin liquid is supplied from the part shape forming part to the passage to be molded, an extra resin for the passage is required, and a step of removing the passage part from the molded component is required, which increases the cost. .

Further, in the case of molding a particularly small component of the film-integrated camera, an extra amount used in the passage for the amount of resin used in the actual component out of the resin used for molding the component. There is a problem that the ratio of the amount of resin becomes large.

The present invention has been made in view of the above points, and reduces the sink marks, deformations, and burrs in a short time, improves the dimensional accuracy, and molds the components of the film-integrated camera at low cost. It is an object of the present invention to provide a film-integrated camera component manufacturing method and a manufacturing apparatus therefor, and a film-integrated camera component.

[0006]

In order to solve the above-mentioned problems and to achieve the object, a method of manufacturing a component part of a film-integrated type camera according to the present invention comprises a fixed mold and a movable mold. A component shape forming portion for forming a component of the film-integrated camera is formed, and a resin liquid is supplied from the hot runner to the component shape forming portion to form the component, and the outer size of the component is 50 mm. × 30 mm × 30 m
It is characterized in that the thickness is m or less and the wall thickness of the component is 3 mm or less.

According to a second aspect of the present invention, there is provided a method for manufacturing a component part of a film-integrated camera, wherein a diameter of a nozzle for supplying the resin liquid of the hot runner is in a range of 0.8 to 2.5 mm. .

According to a third aspect of the present invention, there is provided an apparatus for manufacturing a component of a film-integrated camera, wherein a fixed fixed mold for molding a film-integrated camera component and a movable mold for molding a film-integrated camera component. A movable die and a hot runner for supplying a resin liquid to a component shape forming portion formed by the fixed die and the movable die are provided, and the component shape forming portion has an outer size of 50 mm × 30 mm × It is characterized in that it can be formed into a component of a film-integrated camera having a thickness of 30 mm or less and a thickness of 3 mm or less.

According to a fourth aspect of the present invention, there is provided a film component type camera component manufacturing apparatus, wherein the diameter of the nozzle of the hot runner for supplying the resin liquid is in the range of 0.8 to 2.5 mm. .

According to a fifth aspect of the present invention, there is provided a film-integrated type camera component comprising a hot runner and a resin in a part shape forming portion for molding the film-integrated camera component formed by a fixed mold and a movable mold. The liquid is supplied and molded, and the external dimensions of the component parts are 50 mm × 30 mm × 30.
The thickness is less than or equal to mm, and the thickness of the component is less than or equal to 3 mm.

[0011]

According to the first and third aspects of the present invention, the resin liquid is supplied from the hot runner to the component shape forming portion so that the outer size is 50 mm × 30 mm × 30 mm or less and the wall thickness is 3 mm or less. Mold parts.

According to the second and fourth aspects of the invention, the diameter of the supply hole for supplying the resin liquid of the hot runner is 0.8 to.
Within the range of 2.5 mm, molding can be performed in a short time, sink marks and burrs are reduced, and dimensional accuracy is improved.

According to a fifth aspect of the present invention, the component parts of the film-integrated camera are molded by supplying the resin liquid from the hot runner, and the outer dimensions of the component parts are 50 mm × 30 mm × 30 mm or less. In addition, the thickness of the component is 3 mm or less.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A method of manufacturing a component of a film-integrated camera, a manufacturing apparatus therefor, and a component of a film-integrated camera of the present invention will be described in detail below with reference to the drawings. FIG. 1 is an exploded perspective view of a component manufacturing apparatus for a film integrated camera, and FIG. 2 is a sectional view of a component manufacturing apparatus for a film integrated camera.

In the film-integrated camera component manufacturing apparatus 1, a fixed fixed mold 2 for molding a film-integrated camera part and a movable movable mold 3 for molding a film-integrated camera part. , Fixed mold 2 and movable mold 3
A hot runner 5 for supplying a resin liquid to the component shape forming portion 4 formed by and a ejector plate 7 having an ejector pin 70 for peeling the component 6 molded from the movable mold 3 are provided.

The fixed mold 2 and the movable mold 3 form a component shape forming portion 4 for molding the component 6 of the film-integrated camera. The component shape forming portion 4 has an outer size of 50.
The component 6 of the film-integrated camera having a size of mm × 30 mm × 30 mm or less and a thickness of 3 mm or less can be molded. Here, the outer size is 50 mm × 30
mm x 30 mm or less means that the component parts are 50 mm x
This means that the size is such that it can be accommodated in a rectangular parallelepiped having a size of 30 mm × 30 mm. 50 mm components
If it is larger than × 30 mm × 30 mm, the mold becomes large, and a large component manufacturing apparatus 1 must be used. In addition, the fact that the wall thickness of the component is 3 mm or less means that the wall thickness of half or more of the component is 3 mm or less, and it also includes the one in which the projection or the thick portion is formed. If the wall thickness of the component is larger than 3 mm,
Sinks and deformations easily occur.

The film-integrated type camera is a simple camera in which a film cartridge is loaded in advance at the time of assembly, the photographic film is wound up at each photographing, and the photographed photographic film is taken out. Three
Examples of the component 6 having a thickness of 0 mm or less and a thickness of 3 mm or less include a photographing component such as a lens frame, a release component such as a shutter lever and a release lever, and a winding component such as a winding knob.

The hot runner 5 is provided in the fixed mold 2 and is composed of an air cylinder 50, a needle 51, a nozzle holding ring 52 and a nozzle portion 53. In this embodiment, one nozzle holding ring 52 has a plurality of nozzle portions 5.
3 is provided, the number of nozzle portions 53 is not limited to this, and may be one or plural. The needle 51 inserted into each nozzle portion 53 is driven by one air cylinder 50. Each nozzle portion 53 is provided with a band heater 54 and a temperature sensor 55, and the temperature is controlled independently. The needle 51 is movably held by the guide 56, and the resin liquid guided from the nozzle 57 to the passage 58 by the operation of the needle 51 is supplied to the component shape forming unit 4 formed by the fixed mold 2 and the movable mold 3. To do. The diameter of the nozzle 57 for supplying the resin liquid of the hot runner 5 is 0.8 to
It is in the range of 2.5 mm, and it takes time to supply the resin liquid if it is 0.8 mm or less, and burrs and sink marks easily occur in the component 6 if it is 2.5 mm or more, and the diameter of the nozzle 57 is 0.8 to 0.8 mm. Within the range of 2.5 mm, the resin liquid can be supplied in a short time, and the burr and sink mark of the component 6 are reduced,
And the dimensional accuracy is improved.

The ejector plate 7 is provided with ejector pins 70, and when the component 6 is molded, the movable mold 3 is separated from the fixed mold 2. At this time, the molded component 6 is moved by the movable mold 3. The ejector pin 70 pushes and peels off the molded component 6.

[0020]

As described above, claim 1 and claim 3 are provided.
According to the described invention, the resin liquid is supplied from the hot runner to the component shape forming portion so that the external size is 50 mm × 30 mm × 3.
Since the components having a thickness of 0 mm or less and a thickness of 3 mm or less are molded, the components of the film-integrated camera can be reduced in sinkage, deformation and burrs in a short time, the dimensional accuracy is improved, and the cost is reduced. It can be molded.

According to the second and fourth aspects of the present invention, the diameter of the supply hole for supplying the resin liquid of the hot runner is 0.8 to.
Within the range of 2.5 mm, it is possible to mold the component parts of the film-integrated camera in which sink marks, deformation, burrs are reduced and the dimensional accuracy is improved in a short time.

According to a fifth aspect of the present invention, the components of the film-integrated camera are molded by supplying a resin liquid from a hot runner, and the outer dimensions are 50 mm × 30 mm × 30 m.
Since the thickness is m or less and the wall thickness is 3 mm or less, sink marks, deformations, burrs are reduced and dimensional accuracy is improved in a short time.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of a component manufacturing apparatus for a film-integrated camera.

FIG. 2 is a cross-sectional view of a component manufacturing apparatus for a film-integrated camera.

[Explanation of symbols]

 1 Film component camera component manufacturing equipment 2 Fixed mold 3 Movable mold 4 Component shape forming part 5 Hot runner 6 Film integrated camera component parts

Claims (5)

[Claims] 1. A component shape forming portion for forming a component of a film-integrated camera is formed by a fixed die and a movable die, and a resin liquid is supplied from a hot runner to the component shape forming portion to form the component. And an outer size of the component is 50 mm × 30 mm × 30 mm or less, and a wall thickness of the component is 3 mm or less. 2. The method of manufacturing a component part of a film-integrated camera according to claim 1, wherein the diameter of the nozzle for supplying the resin liquid of the hot runner is in the range of 0.8 to 2.5 mm. 3. A fixed fixed mold for molding a film-integrated camera part, a movable movable mold for molding a film-integrated camera part, and the fixed mold and the movable mold. And a hot runner for supplying a resin liquid to the part shape forming part, wherein the part shape forming part has a film size of 50 mm × 30 mm × 30 mm or less and a thickness of 3 mm or less. An apparatus for manufacturing a component of a film-integrated camera, characterized in that the component can be molded. 4. A component manufacturing apparatus for a film-integrated camera according to claim 3, wherein the diameter of the nozzle for supplying the resin liquid of the hot runner is in the range of 0.8 to 2.5 mm. 5. A component shape forming section for molding the component parts of a film-integrated camera formed by a fixed mold and a movable mold,
Molded by supplying resin liquid from a hot runner, and the external dimensions of the above-mentioned components are 50 mm x 30 mm x 30 mm
A constituent part of a film-integrated camera, characterized in that the thickness of the constituent part is 3 mm or less.