JPH02253918A - Supporting device for gate cutting of molding member - Google Patents

Abstract

PURPOSE:To perform automatically gate cutting whose productivity is favorable, by a method wherein an energizing device stretching and energizing a gate provided on a supporting device, with which a molded lens is fitted, in an axial direction and a cut piece supporting member which is obtained by providing a heating device arranged on a cutting position of the gate on a supporting device such as a runner part are furnished. CONSTITUTION:A moving rest 10 which is constituted slidably in a longitudinal direction and in a rectangular form is arranged on the top of a base rest 9 on a flat plate. Cut piece supporting members 26, 27 are constituted heatably so that they are connected with a load wire, gates 1, 1' of a work 8 fitted are heated by a supporting device and molded lenses 1, 1' can be cut off easily from runners 5, 5'. Elastic members 46, 47 pulling (stretching) the molded lenses 1, 1' molded unitarily with the work 8 in the opposite directions from each other are arranged.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a workpiece support device for cutting a gate formed between a molded lens and a runner of a workpiece molded from a synthetic resin material.

[Conventional technology]

No specific cutting device is known yet for automatically cutting the gate portion integrally formed between the runner portion and the molded lens of a molded member (workpiece) molded from a synthetic resin material, but it is generally used. A known cutting method of this type is a manual cutting method.

In other words, the manual cutting method involves a worker picking out each piece one by one using a tool equipped with a heating device on the cutting edge of the nipper to facilitate cutting, and holding the workpiece and the nipper in their hands. This is a manual cutting method.

When cutting with this method, for example, when molding a molded lens 1'', as shown in FIG. .

In other words, because the molded lens is cut manually using heated nippers, there is a possibility that the molded lens may be damaged by handling, and in order to increase productivity, it is cut safely from the middle of the gate (middle position). There is.

[Problem to be solved by the invention]

In the above-mentioned manual cutting method, it is necessary to form a notch into which the protrusion 3 is inserted even in the frame 2'' into which the molded lens 1 is inserted.
' has to be made larger by the size of the protrusion 30.

In addition, the above-mentioned sea entry work requires a lot of labor, and also causes problems such as unstable quality and high costs.

Especially when cutting lenses with different sizes during production, adjusting the cutting position each time, or when cutting with high precision is required, such as when dimensional differences caused by temperature differences in synthetic resins are a problem. This was a major hindrance to transitioning to automated production.

The present invention was created in view of the above problems.

That is, it is an object of the present invention to provide a support device for gate cutting of a molded member that automatically performs gate cutting with high productivity even in mass production and also in high variety small quantity production.

[Means to solve the problem]

The present invention provides a measuring moving table provided on a base, a support means provided on the moving table in which a runner part and a sprue part of a workpiece are configured to be removably attached, and a supporting means that can be mounted in at least one direction. A molded lens is arranged in series on the side and is integrally formed with the runner part through a gate formed therein, and is configured to be detachable.
and a support means configured to be slidable in the moving direction of the movable table, a drive mechanism for sliding the support means, and a gate provided on the support means to which the molded lens is attached, and is biased by stretching in the axial direction. The present invention is a support device for gate cutting of a molded member, which includes a biasing means for cutting a molded member, and a cutting receiver in which a supporting means such as the runner section is provided with a heating means disposed at a cutting position of the gate.

[Example] Examples of the present invention are shown in No. 1.2, 3, 4, 5, 6°7.8.
This will be explained with reference to Figures 9, 10 and 11.

FIG. 1 is a plan view showing a side view of a gate cutting device for a molded member according to an embodiment of the present invention, with a part thereof omitted; FIG. Plan view,
3 is a plan view of the urging means of the chuck device shown in FIG. 2, FIG. 4 is a sectional view from the side showing the structure and operation of the support means shown in FIG. 1, and FIG. 6 is an enlarged plan view from the top of the molded member used in the apparatus of the present invention;
Figure 7 is an enlarged plan view from the side of Figure 6, Figure 8 is
FIG. 9 is an enlarged plan view from the top of another molded member used in the apparatus of the present invention, and FIG. 9 is an enlarged plan view from the side of FIG.
FIG. 1O is a plan view showing the operation of the movable table equipped with the molded member shown in FIG. 1, FIG. 11 is a front sectional view showing a molded lens formed according to the present invention and mounted on a frame body, and FIG. 12 is a front cross-sectional view showing the shape of a molded lens mounted on a frame by a conventional method, and the shape of the molded member used in the present invention is explained with reference to FIGS. In the drawings, the same members and structures will be described using the same reference numerals.

First, the shape of the workpiece 8 used in the apparatus of the present invention will be explained.

Molded parts made of synthetic resin material (plastic) (
As shown in FIGS. 6 and 7, the workpiece 8 includes a conical sprue 6 formed by an inflow hole for the molding material in the mold and an upright sprue 6, and a circular sprue 6 on the left and right sides of the base end of this sprue 6, respectively. Long rod-shaped runners 5 and 5° are integrally molded to have equal lengths in the lateral direction. This runner 5 and 5
Gates 4 and 4° formed in a radial line are formed in series at the tip of the lens, and circular molded lenses 1 and 1' are formed at the tip, respectively.

Further, a protruding circular bottle 7 is integrally molded directly below the sprue 6, that is, on the lower end circumferential surface via the runner.

Furthermore, bins 7' and 7'' are integrally molded in series with the bin 7 and extend downwardly on the lower end peripheral surface of the tip of the runner 5 and 5°.

8 and 9 show that four molded lenses 1.1' are molded in contrast to the two molded lenses 1 and 1' of the molded member (work) 8 in FIGS. 6 and 7 described above. ,
1. This figure shows the shape of a workpiece 8 which is integrally molded with 1' and 1'. That is, Fig. 6.

In contrast to the two molded lenses 1 and 1" shown in FIG. 7, the smaller diameter runners 61., .6 shown in FIGS.
Molded lenses 1.1 at the tip of each of 2, 63 and 64
°, l", 1", and 4 pieces are Game Toro 5.66.67.
It is integrally molded via 68.

Also, below the tips of the runners 61, 62, 63.64, there are bottles 69, 70, 71, 72 which are stretched downward.
are each protruded.

In addition, the runner 61. ．． The base end of 62, 63.64 is 2
Large-diameter runners 5 and 5° are formed by combining small-diameter runners 61, 63, and 62, 64, respectively, and a sprue 6 is integrally formed on the center core thereof. That is, thick circular runners 5 and 5 are integrally molded in the left and right directions of the proximal end of the conical sprue 6, extending laterally to equal lengths, and small-diameter runners 61, 62 and 63, 64 are installed at the tips of the runners 5 and 5, which are integrally molded.
are formed into branches, and a gate 65.6 is added to the tip of each branch.
6 and 67.68 respectively.
1", 1", and 1" are integrally molded.

Further, a large-diameter bottle 73 is formed extending downward on the lower end surface of the shaft center of the large-diameter runners 5 and 5'.

The two molded lenses 1 and l shown in FIGS. 6 and 7 above
A gate cutting device that cuts the gates 4 and 4 degrees by mounting the workpiece 8 formed with "" will be described below.

As shown in FIGS. 1 and 2, on the upper surface of the flat base 9, there is a rectangular movable table l that is configured to be slidable in the longitudinal direction.
O is arranged. The side surface of the - end of the base 9 (
A drive source (servo motor) 11 configured to move the movable table 10 precisely is disposed on the right side (right side), and a drive source (servo motor) 11 configured to move the movable table 10 precisely is provided, and although not shown, it connects the center of the movable table 10 and the center of the base 9. It is configured to slide on the base 9 using a ball stopper 91 mechanism between the parts.

On the upper surface of the moving table 10, lens supporting means (chuck mounting bases) 12 and 13 for supporting molded lenses 1 and 1'' of a molded member (work) 8 configured to be slidably movable in the longitudinal direction hIi11 are installed. The blocks 30 and 31 are respectively disposed at the left and right halves of the movable base 10. Also, between the lens chuck mounting bases 12 and 13 of the movable base 10, l: At the center position, a sprue and runner chuck support means (chuck mounting stand) 14 are arranged, into which the sprue 6 and runners 5 and 5 degrees of the molded member 8 are inserted and clamped and mounted by opening and closing operations, respectively.

The inner wall surfaces of the lens chuck mounting bases 12 and 13 are formed in a ■-shape in order to easily hold the molded lens 1 and the outer periphery (circumference) of 1°, respectively. Lens chuck claws 15, 16 and 17, 18 are provided with L-shaped side surfaces that are arranged to face each other and can be opened and closed freely.

The above chuck claw for molded lens 15. X6 and 17.1
．． Air cylinders 21 and 22 are attached to the base end of the L-shape of 8 through air chuck drive units 19 and 20, respectively, to open and close the lens chuck claws 15.16 and 17.18. is configured to do so.

Further, a device including an air cylinder and its driving machine 4123 is mounted upright on the sprue 8 and the chuck mounting base 14 with a runner of 5.5°, and the tips of the air cylinders shown in FIGS. As shown in FIG. 5, U-shaped clamping claws 24 and 25 that are driven to open and close in the front and rear directions are correspondingly arranged. That is, the clamping claws 24 and 25 formed to insert and clamp the shaft diameters of the runners 5 and 5' and the outer diameter of the sprue 6 are arranged so that the U-shaped opening wall surfaces face each other. There is.

The configuration of a device that includes the air cylinder and the drive mechanism 23 will be briefly explained with reference to FIGS. 4 and 5.

4 and 5 show a chuck that clamps the runners 5 and 5, etc., FIG. 4 shows the chuck claws 24 and 25 in an open state, and FIG. 5 shows the chuck claws 24 and 25 in an open state.
5 indicates the closed state.

Inside the cylindrical main body 74 shown in FIG. 4, a piston-shaped sliding shaft 75 connected to the tip 83 of the air cylinder is disposed at the center, and the inner circumferential wall surface of the main body 74 and the above-mentioned A ring-shaped piston 76 configured to be slidable on the outer circumferential wall surface of the sliding shaft 75 is connected to the tip of the air cylinder 84 and disposed therein. Further, the upper end surface of the piston 76 is formed with a flange portion expanding in the outer diameter direction as shown in the figure, and the base end portion thereof is formed on the end surface of the flange portion so as to be rotatable with the tip portion of the sliding shaft 75. Rollers 79 and 80 disposed at the ends of each of the dogleg-shaped claw operating levers 77 and 78 are configured to rotate as the sliding shaft 75 and piston 76 move up and down. Also, the bent portions 8 of the pawl actuating levers 77 and 78
1 and 82 are rotatably connected to the proximal ends of the chuck claws 24 and 25 by means of bottles, respectively.

The support device with the above structure has a space at the lower end of the main body 74, and the vertically operating chuck claws 24 of the sliding shaft 75 and the piston 76 are moved by direct inflow and outflow of gas from the tips 83 and 84 of air cylinders communicating with the spaces. and 25 are operated to open and close.

The sprue chuck device 14 and air chuck drive unit 1
9 and 20 also have the same configuration as above, so the explanation will be omitted.

It is installed between the chuck jaws 24 and 25.
In the position directly below the end side of the molded lenses 1 and 1° of the gates 4 and 4' between the runners 5 and 5° of the runners 5 and 5° of the phantom dotted lines shown in FIG. 2 and the molded lenses l and 1°, However, in order to connect the ends of the conductive wires, and to perform accurate cutting and prevent burrs when cutting the gates 4 and 4 degrees of the workpiece 8, a plate-shaped cutting receiver is installed at a position immediately below the lowering of the cutters 28 and 29. Members 26 and 27 are attached to the respective side wall surfaces of the gates 4 and 4' of the chuck mounting base 4 in the axial direction.

Further, the members 26 and 27 of the cutting receiver are connected to the conductive wire as described above, and heat the gates 1 and 1° of the workpiece 8 mounted by the support means, so that the molded lenses 1 and 1' can be easily moved to the runners 5 and 5. It is constructed so that it can be heated so that it can be cut from

As shown in FIG.
Elastic members 46 and 47 are provided which stretch (distract) 1° in opposite directions. That is, spring locking pins 48 and 49 are implanted on the side wall surfaces of the air chuck drive units 19 and 20 to lock one end of the elastic members 46 and 47, and the spring locking pins 48 and 49 are installed on the side wall surfaces of the air chuck drive units 19 and 20 to lock one end of the elastic members 46 and 47. Also, spring locking pins 50 and 51 are implanted to lock the other ends of the elastic members 46 and 47, thereby constantly biasing the chuck drive units 19 and 2o in a direction to separate them from each other. .

Chuck drive unit 19 formed by the elastic members 46 and 47
and a third to enable sliding in the axial direction of the
As shown in the figure, lens chuck drive units 19 and 20
The connecting parts of the sliding shafts 52 and 53 of the air cylinders 21 and 22, respectively, constitute play areas 54 and 55 of the floating mechanism, and It is configured to be slidable.

As shown in FIGS. 1 and 2, on the side sides of the lens chuck mounting stands 12 and 13 on the base 9, there is a sensor mounting member 32, which is configured in a U-shape and is mounted upright on its side wall.
and 33 are fixed.

That is, the sensor mounting members 32 and 33 are arranged with their U-shaped opening sides facing down on the base 9, and their ends are mounted with screws or the like to attach the sensor mounting members 32 and 33 to the lens chuck mounting bases 12 and 1.
3. It is attached to cover the top.

As shown in the figure, lens chuck claws 15, 16 and 171B on which the molded lenses 1 and 1 are mounted are mounted on the upper end surfaces of the sensor mounting members 32 and 33 by moving in the left and right direction. 1'' are mounted at positions where their respective peripheral end surfaces abut against sensors 34 and 35.

Near the sensors (limit switches) 34 and 35, T-shaped sensor operating rods 36 and 37 are arranged with their T-shaped heads facing each other, and the lower end surface of one of the T-shaped rods is connected to the sensor operating rods 36 and 37. It is configured and arranged to face the tip projections 34 and 35.

On the other lower end surface of the T-shape is the sensor operating rod 36.
Elastic member 3B that always urges 37 and 37 away from each other
and 39 are arranged. That is, when the inner ends of the molded lenses 1 and 1' supported by the chucks 17 and 15 come into contact with the operating rods 36 and 37, respectively, due to the movement of the moving table 10, they resist the urging of the elastic members 38 and 39. The sensors 34 and 35 are turned on when they come into contact with each other.

Sensor means 4o, 41, 42, and 43 for controlling the movement position of the movable base 10 are provided on the lower side wall surfaces of the base 9 and the movable base 10.
．． A cross-shaped photoelectric sensor 40 disposed at the center on the base 9 side of the edge of the sliding side wall of the base 9 and the movable table 10, on which 44 and 45 are respectively disposed, is covered with a shielding plate 56. It is arranged according to the requirements.

Further, a sensor 4 having the same shape is located to the right of the photoelectric sensor 40.
2 and a sensor 44 are disposed on the left side, respectively.

Correspondingly, an L-shaped sensor 41 and a T-shaped sensor 4 are arranged on the edge of the sliding side wall of the movable table 10 with respect to the base 9.
3 is placed on the left, and a sensor 45 having the same shape is placed on the right with desired spacing between them.

The photoelectric sensors 40 and 41 support the workpiece 78 on the supporting device 2.
4.25 and lens support devices 14, 16 and 17.
Gates 4 and 4 when sandwiched by 18, respectively
With respect to the base 9 by measuring the cutting position of
is the origin of movement (0 point), sensors 42 and 43 are sensors for over-controlling the moving table 10 to the right, and sensors 44 and 45 are sensors for over-controlling the moving table 10 to the left. It is a sensor of

Although not shown, a gate cutting device whose base end is mounted on the base 9 is provided above the chuck device 74 of the runner section and the sprue section.

That is, vertically movable air cylinders 85 and 86 having plate-shaped cutters 28 and 29 attached to their tips for cutting the gates 4 and 4' are arranged at a predetermined distance.

Next, the operation of the gate cutting device of the present invention with the above configuration (
Process order) will be explained.

First, the moving table 10 is placed at a desired position on the base 9.Next, in order for the robot to grip the molded member (work) 8 formed in the previous process, the bins 7.7", 7" are placed upward in advance. Place it towards.

Next, the robot holds the bottles 7.7' and 7' and places them between the chuck claws 24 and 25 of the sprue chuck device 14 that have been opened in advance and between the chuck claws 15.16 and 17.18 for the lens. When it is transported and inserted, the chuck claws 24 and 25 are first operated in the closing direction by the sensor.

Due to this operation, the work 8 and the sprue 6 are held (supported)
Installing. Next, the lens chuck claw 15. N6 and 1.7.18 close to clamp the molded lenses 1 and 1'', respectively. In this clamping operation of the molded lenses 1 and 1', the lens chuck claws 15 and 16 and 17 and 18
The molded lenses 1 and 1'' act to sandwich their circular center cores with the center centers of the ■ shape due to the V-shapes formed on their respective opposing sides. The elastic members 46 and 47 are held so as to pull the molded lenses 1 and 1° toward each other toward the sprue chuck 14 against tension.

The air chuck drive which clamps the molded lenses l and 1' by driving the air cylinders 21 and 22 together with the elastic members 46 and 47 which tension the gates 4 and 4'' of the workpiece 8 supported by the chucks mentioned above. device 12
and 13 are pulled backwards to complete the installation.

The workpiece 8 supported by each of the chucks is cut by cutting means, ie, canters 28 and 29, which measure the cutting positions of the gates 4 and 4'.

The measuring means for determining the cut position of the gates 4 and 4' will be explained with reference to FIG.

First, the workpiece 8 held by each chuck at the XO position shown in the figure (a position where it is easy to attach the workpiece 8 to the chuck) is moved by moving the moving table 10 to the left (-X direction).
The sensor 35 (sensor A) is brought into contact xl and turned ON. Subsequently, it is moved to the right (+X direction) and brought into contact with the sensor 34 (sensor B) X2, turning it on. The positions of the cutters 29 (A) and 28 (B) of the cutting means set in advance in the control circuit, the dimensional values of the molded lenses (D) 1'' and (D) 1, and the distance dimension and distance of the cutter 29A from the sensor 35A are determined in advance. How to increase the distance between the cutter 28B and the moving table 10 from the sensor 34B
It is measured by the movement of For details, see Molded Lens 1°
(Lens A) and the molding lens 1 (Lens B) move to the left (-X direction) from the position XO of the movable table 10 on which the workpiece 8 of the chuck device 13 is mounted, and the molding lens 1゛ (lens A) comes into contact and ONL
, position X1, and the moving table 10 is further moved to the right from the above XO (
+ cutter position IA (cutter A) and sensor 34 (sensor B) and the cutter position (I
The position to which the moving table 10 has moved according to the distance dimension B), that is, X3-X1+j! A-D, gate 4 at cutter 29
The cutting position is X3. Further, the cutting position of the gate 4 by the cutter 28 is X4. That is, X4-X2-j! B+
It is D.

According to the above measurement, the movable table IO is moved by the drive of the servo motor 11 and stops at the cutting position of the gate 28. As the air cylinder 86 is lowered, the cutter 29 molds the lens by 1°.
is cut from the gate 4°.

Next, move servo motor 1 to the previously measured gate cutting position.
1, the movable table 10 is moved and stopped at the cutting position of the gate 4, the air cylinder 85 is lowered, and the molded lens 1 is cut from the gate 4 by the cutter 28 (cutter B). The cut molded lenses 1 and 1'' and the sprue 6 are moved to the position where the workpiece 8 is mounted on the movable table 10 and stopped, and are held by the robot and held by the chuck claws 15.
16 and 17 and 18, the sprue 6 is taken out to the outside and transported to the next process, and the sprue 6 is also attached to the chuck claw 24.
Then, by the opening operation of 25, it is clamped by a robot or the like and disposed of.

After that, the above-mentioned operation steps are repeated to perform automated production.

In the above embodiment, the workpiece 8 was formed by molding two molded lenses 1 and 1゛, but the present invention is not limited to the above embodiment, and it is possible to use a workpiece formed by molding a single lens. Of course, it can also be applied to a workpiece in which four lenses are molded as shown in FIGS. 8 and 9.

〔effect〕

According to the present invention with the above configuration, automated production is possible regardless of whether it is mass production or small quantity production of a wide variety of products, and cutting is easy because the cutting receiver, which has a mechanism for stretching the gate part and a heating means, is equipped with a stand and a cutter. Can be done quickly and accurately. Further, since the support means is formed in a V shape, various effects such as the ability to quickly and accurately attach the lens to the center core are achieved.

[Brief explanation of drawings]

FIG. 1 is a plan view from the side of a gate cutting device for molded parts according to an embodiment of the present invention, FIG. 2 is a plan view from the top of FIG. 1, and FIG. 3 is a plan view from the top of FIG. FIG. 4 is a sectional view from the side showing the structure and function of the support means shown in FIG. 1; FIG. FIG. 3 is a cross-sectional view from the side showing the structure and function of the support means. FIG. 6 is a top plan view of the molded member used in the present invention. FIG. 7 is a plan view from the side of FIG. 6. FIG. 8 is a top plan view of another molded member used in the present invention. FIG. 9 is a plan view from the side of FIG. 8. FIG. 10 is a plan view showing the sequence of operations for attaching a molded member to the apparatus of the present invention shown in FIG. 1 and cutting and measuring it. FIG. 11 is a plan view showing a molded lens cut according to the present invention mounted on a frame. FIG. 12 is a plan view showing a state in which a conventional molded lens is mounted on a frame. 1... Molded lens 2... Lens frame 3...
Projection 4.4'...Gate 5.5'...
・Runner 6...Sprue 7.7', 7"...Bin 8...Work 9...Base 10.
...Moving table 11...Drive source 12.13...Lens chuck mounting base 14...Sprue chuck mounting base 15.16, 17.18...Molding lens chuck claws 19.20... Air chuck drive unit 21.22 23... Air cylinder 24° 26° 28° 32° 34° 38° 40° 25... Runner claw 27... Cutting receiver is member 29... Cutter 33...・Sensor mounting member 35...Sensor (limit switch) 39...Elastic member 41.42, 43, 44.45...Sensor tom 46.47...Elastic member 54...Floating mechanism

Claims (1)

[Claims] (1) A measuring moving table provided on a base, a support means provided on the moving table in which a runner part and a sprue part of a workpiece are configured to be removably attached, and a supporting means provided on the same side at least in one direction. a support means connected in series to the runner section, configured to be able to attach and detach a molded lens integrally formed through a gate formed in conjunction with the runner section, and configured to be slidable in the moving direction of the movable table;
a driving mechanism for sliding the support means; a biasing means for axially stretching and urging a gate provided on the support means on which the molded lens is mounted; 1. A support device for gate cutting of a molded member, comprising: a cutting receiving member provided with a heating means disposed at a position.