JP2001341178A - Injection molding apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an injection molding apparatus constituted so as to enhance the temperature stability of a molding material in its material supply part by providing a structure for exerting an effect on the temperature gradient in its supply cylinder to enhance and stabilize the grade of a molded article and capable of being miniaturized. SOLUTION: An annular gap part 11 is formed to the intermediate part of a supply cylinder 113 so as to be digged down from the outer periphery of the supply cylinder toward the center thereof. A material supply port 113c to which a hopper 111 is attached is provided to the supply cylinder 113 on the base part side of the gap part 113a and a cooling pipe 113b for passing a cooling medium of every kind such as cooling water or the like is provided in the supply cylinder 113 between the material supply part 113c and the gap part 113a.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to an injection molding apparatus.

[0002]

2. Description of the Related Art Generally, an injection molding apparatus includes a molding die, a material supply section for dissolving and supplying the molding material, an injection mechanism for injecting the molding material into the molding die, and opening and closing the molding die. And a mold clamping mechanism.

The material supply section includes, for example, a material supply section for supplying a molding material in the form of a pellet, a material supply path extending from the material supply section, and a material discharge section for releasing the molding material at the tip of the material supply path. And a supply cylinder comprising:
The supply cylinder has a material moving means such as a supply screw for feeding the molding material while rotating the molding material, for moving the molding material along the material supply path, and heats the molding material moving along the material supply path. Heating means such as a heating heater for the purpose.

[0004] The injection mechanism is configured to, for example, inject a molding material supplied by a material supply unit from an injection nozzle toward a molding die by an injection cylinder.
The injection cylinder drives the supply screw of the material supply unit in the axial direction to inject the molding material, and directs the molding material supplied from the material supply unit separately from the material supply unit to the molding die. Various structures are used, such as those configured to extrude.

Further, the mold clamping mechanism is configured to drive the movable portion of the mold to open and close, and to maintain the mold clamped state at a predetermined pressure. As a structure of the mold clamping mechanism, a mechanism mainly provided with a hydraulic cylinder for giving an opening / closing operation of a molding die and a pressing force in a mold clamping state is used.

[0006]

In the material supply section of the conventional injection molding apparatus, since the inside of the supply cylinder is heated by the heating means, when the temperature of the material supply section of the supply cylinder rises. Since the pellet-shaped molding material is partially melted and fixed in the material charging section, there is a possibility that the subsequent molding material cannot be charged. For this reason, an appropriate cooling means such as a cooling pipe for passing cooling water is provided near the material charging section in many cases so that the temperature does not become close to the melting point of the molding material.

However, when the vicinity of the material charging portion of the supply cylinder is cooled as described above, a large temperature gradient is formed between the heating region for heating the material in the supply cylinder and the material charging portion. And the fluctuation of the cooling state of the cooling means (for example, the temperature of the cooling water, etc.), as a result, the stability of the temperature of the heating area is impaired, and the temperature of the molten molding material discharged from the material discharging portion is reduced. Is easily changed, and there is a problem that molding quality is reduced and variation in molding quality is increased.

Further, due to the above temperature environment,
In order to make the molten state of the molding material uniform and stable,
The length of the supply cylinder needs to be increased. For example, in the case of a general molding apparatus, L / D (effective length of supply screw / diameter of supply screw) needs to be about 18 to 22 in order to uniform the molding material. Therefore, even in a small molding apparatus, the material supply section needs to have a certain length in the material supply direction, so that the entire apparatus is increased in size and the residence time of the molten molding material is increased.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problem, and an object of the present invention is to provide a structure which influences a temperature gradient in a supply cylinder to stabilize the temperature of a molding material in a material supply section of an injection molding apparatus. It is an object of the present invention to provide an injection molding apparatus which can improve the performance and improve the quality of a molded product and can stabilize the molded product, and can be downsized.

[0010]

According to the present invention, there is provided an injection molding apparatus configured to inject a molding material into a mold to produce a molded product. A material supply unit for supplying the molding material in a heated and melted state; a material supply unit for supplying the undissolved molding material; a material supply path extending from the material supply unit; A material discharge section provided at a tip of the material supply path, and a supply cylinder including a heating unit for heating the molding material moving in the material supply path; and forming the material along the material supply path. And a material moving means for moving the material, wherein a gap is provided between the material charging section and the heating means in the supply cylinder.

According to this invention, since the gap is provided between the material charging section and the heating means in the supply cylinder, the heat generated by the heating means is blocked by the gap, so that the material charging section is prevented from overheating. In addition to this, a large temperature gradient is generated in the vicinity of the gap, while the temperature gradient on the material discharge side as viewed from the gap is reduced, so that the temperature of the molding material discharged from the material discharge section is stabilized. Since the quality and stability of the molded product can be improved and the length of the heating region in the material supply direction can be shortened, the apparatus can be downsized.

In the present invention, it is preferable that the gap has a structure dug down from the outer peripheral surface of the supply cylinder toward the center. According to this means, the gap can be easily provided in the supply cylinder by forming the gap from the outer peripheral surface toward the center.

In the present invention, the gap is preferably an annular groove closed in a circumferential direction of the supply cylinder. According to this means, since the heat insulating effect can be exerted evenly in the circumferential direction of the supply cylinder, the temperature stability of the molding material can be further enhanced.

In the present invention, it is preferable that a distal end portion on the material discharge side with respect to the gap and a base end portion on the material input side with respect to the gap are formed of different members. According to this means, since the distal end portion and the proximal end portion are formed of different members, both portions can be formed of materials having different thermal conductivity from each other. A thermal environment can be realized more freely. For example, by constructing the distal end portion using a material having better thermal conductivity than the proximal end portion, the material input section is provided at the proximal end portion while maintaining uniformity and stability of the temperature of the distal end portion. Temperature rise can be suppressed.

In the present invention, it is preferable that the distal end portion and the proximal end portion are configured to be fitted at the bottom of the gap. According to this means, both parts are fitted to each other at the bottom of the gap, so that both parts can be easily assembled.

In the present invention, it is preferable that a cooling means is provided between the material charging section and the gap. According to this means, since the cooling means is provided between the material charging section and the gap at the base end portion, the temperature rise of the material charging section can be further reduced. As the cooling means, a fluid is circulated inside the material charging section, an uneven portion for heat radiation is provided on an outer peripheral portion of the material charging section, or a surface treatment is performed on an outer peripheral portion of the material charging section to enhance a heat radiation effect. Or the three may be used in combination. Further, in the present invention, it is preferable that a gas is provided in the gap to perform heat insulation. Further, in the present invention, it is preferable that the cooling means has a concave and a convex for heat dissipation.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment of an injection molding apparatus according to the present invention will be described in detail with reference to the accompanying drawings. FIG. 1 is a schematic configuration diagram illustrating an overall configuration of an injection molding apparatus 100 according to the present embodiment. In the present embodiment, the material supply unit 110 for supplying various molding materials such as plastic and metal, the mold 140, and the molding material supplied by the material supply unit 110 are injected toward the mold 140. , And a mold clamping mechanism 130 for driving the mold 140 to open and close. In the present embodiment, it is preferable that the mold clamping mechanism section 130 be disposed so as to overlap the material supply section 110 and the injection mechanism section 120 in a plan view, as viewed in the direction of arrow A. Also, the mold clamping mechanism 130
Is preferably arranged below the material supply unit 110 and the injection mechanism unit 120 so as to overlap in a plan view when viewed from the direction of arrow A.

The material supply unit 110 includes a hopper 111 for charging plastic pellets and the like, a supply screw 112 for feeding out molding material, and a hopper 11.
1, a supply cylinder 113 surrounding the supply screw 112, a driven pulley 114 for rotating the supply screw 112, a drive belt 115, and a drive belt 1
A drive pulley 116 is rotatably connected to the driven pulley 114 through the drive motor 15, and a drive motor 117 for rotating the drive pulley 116 is provided. Supply cylinder 113
A means for plasticizing the material, such as a heater (not shown), is built in the inside.

The injection mechanism 120 includes the injection cylinder 12
1, an injection plunger 122 driven in and out in the axial direction by an injection cylinder 121, and an injection plunger 122
Injection block 123 on which the plunger operates, and the injection plunger 12
2 is provided with a measurement confirmation sensor 124 for detecting the operation of No. 2 and an injection nozzle 125 attached to the injection block 123. The injection block 123 is configured such that a supply path 123a that communicates with a discharge port of a material supply path inside the supply cylinder 113 of the material supply section 110 and an injection plunger 122 that communicates with the supply path 123a and is slidable. The material measuring chamber 12 is formed of a columnar space into which the molding material is drawn by the rise of the injection plunger 122.
3b is provided. The material measuring chamber 123b communicates with the injection nozzle 125. The injection nozzle 125 is mounted on the material introduction part of the upper die 141 of the die 140.

The mold driving mechanism 1 includes a mold driving cylinder 1.
31, a mold driving cam 132 operated by a mold driving cylinder 131, a lower mold attaching member 133 which is moved up and down by the mold driving cam 132 and is attached to a lower mold 142 of the mold 140, and a mold clamping cylinder 134. The mold clamping lever 134 is configured to rotate together with the rotating shaft 135 by the mold clamping cylinder 134, and the mold clamping lever 136 in contact with the mold driving cam 132 and the auxiliary cylinder 137 for vertically moving the lower mold mounting member 133. Are provided. The mold drive cylinder 131 is configured to be rotatable around a rotation shaft 131a, and is capable of moving a drive shaft 131b rotatably connected to the mold drive cam 132 (that is, forward and backward). It is configured to be able to. The mold drive cam 132 is configured to be slidable along a drive guide surface 136c provided on the mold clamping lever 136. The mold clamping lever 136 has a fulcrum part, a fitting hole 136a fitted and fixed to the rotating shaft 135, and a driving part thereof, an engaging part 136b for a driving part 134a of the mold clamping cylinder 134. The configuration is such that a drive guide surface 136c for the mold drive cam 132, which is a pressurized portion, exists therebetween. Therefore, the mold clamping lever 136
Is rotated about a rotation shaft 135 by the operation of the drive unit 134a of the mold clamping cylinder 134, and presses the mold drive cam 132 upward.

In this embodiment, the drive motor 117
The supply screw 112 is rotated by the
When a pellet of a molding material (plastic or metal) is put into the container, the molding material is gradually fed along the material supply path of the supply cylinder 113 by the spiral groove of the supply screw 112, and is heated inside the supply cylinder 113 to melt. It is supposed to. The molten molding material is supplied at a predetermined pressure by the rotation of the supply screw 112 to the supply path 123a.
Pressurized toward

FIG. 3 is a schematic configuration diagram showing a more detailed structure of the material supply section 110 together with an injection mechanism section 120. In the present embodiment, the supply cylinder 113 itself is made of steel or other metal material having relatively good thermal conductivity in order to stabilize the temperature distribution in the cylinder.
A material supply path extending in the illustrated horizontal direction is formed. In the middle of the outer peripheral surface of the supply cylinder 113, an annular gap 1 having a structure dug down from the outer periphery toward the center side.
13a are formed. The hopper 111 is attached to the base side of the gap 113a, and a supply port (material input port) 113c that opens to the material supply path is provided, and a gap between the supply port 113c and the gap 113a is formed. Cooling pipe 113b for passing various refrigerants such as cooling water between
Is built-in. The cooling pipe is connected to a coolant supply device or a coolant circulation device (not shown), and the coolant passes through the inside thereof, thereby forming a gap 113 a and a material supply port 113.
c to cool the cylinder portion.

Further, a heater 113d is provided on the tip side of the gap 113a. This heater 1
13 d is for heating and gradually melting the molding material sent by the supply screw 112. The heater 113 d is provided so as to extend in the axial direction of the supply cylinder 113, and is appropriately controlled by a temperature detected from a temperature sensor (not shown) disposed inside the supply cylinder 113. In this case, the supply cylinder 11
Preferably, a plurality of heaters are arranged in the axial direction of 3, and each heater is independently controlled in temperature.

FIG. 4 is an enlarged sectional view showing the structure near the supply cylinder 113. As described above, the gap 11
Various configurations of the supply cylinder 113 having 3a are conceivable. For example, an annular groove may be formed on the outer periphery of the integral cylinder material by cutting or the like.
The inner part from the bottom of a is composed of a common cylinder material,
The portion outside the bottom of the gap 113a is
The members may be attached to each other as separate members on the distal side and the proximal side with respect to a.

In this embodiment, as shown in FIG. 4, the distal end of the cavity 113a is formed of a first cylinder material 113A, and the base end of the cavity 113a is formed of a second cylinder material 113B.
It consists of. Here, by changing the material between the first cylinder material 113A and the second cylinder material 113B,
Suitable thermal conductivity can be provided on both sides of the gap 113a. In the present embodiment, by forming the first cylinder member 113A from a material having better thermal conductivity than the second cylinder member 113B, the gap portion 113 is formed.
In addition to increasing the uniformity and stability of the temperature of the heating region at the tip side than a, the temperature rise at the base end side of the gap 113a is suppressed, and the vicinity of the feed port 113c is overheated. So that there is no

The first cylinder member 113A and the second cylinder member 113B are joined on the inside (bottom) of the cavity 113a. In particular, in the present embodiment, the first cylinder material 1
13A and the second cylinder member 113B are configured to be fitted to each other, so that assembly can be easily performed.

Next, the operation of the injection molding apparatus having the above configuration will be described with reference to FIGS. FIG. 2 is a schematic explanatory view showing the state of the mold clamping mechanism 130 in the mold opening state and the mold clamping state, and FIG. 5 is a schematic flowchart showing the operation procedure of the present embodiment.

First, when the mold 140 is in the mold open state, the mold clamping mechanism 130 is in the state shown in FIG. That is, when the lower mold 142 is located below,
When the mold 40 is in the mold open state, as shown in FIG. 2A, the drive shaft 131b of the mold drive cylinder 131 is retracted (that is, retracted), and the mold drive cam 132 is in an oblique posture. ing.

In the mold clamping mechanism 130, in order to bring the mold 140 into the mold clamped state from the above-described mold open state, first, the auxiliary cylinder 137 attached to the lower mold 142 via the attachment member 137a operates. The lower mold 142 is pulled upward, and the mold drive cylinder 131 is operated to move the drive shaft 131b forward, and the mold drive cam 132 is moved to the drive guide surface 1.
The lower die 142 is pushed up from below by rotating while sliding along 36c. Then, the mold driving cam 132 is positioned so as not to rotate any more due to the shape of the driving guide surface 136c. In a state where the mold driving cam 132 is positioned with respect to the mold driving lever 136, the mold 140 is usually already closed.

Thereafter, the mold clamping cylinder 134 is operated to pull in the driving portion 134a and to rotate the mold drive lever 136 counterclockwise about the axis of the rotating shaft 135. Mold drive cam 132
Is pressed upward, and a predetermined clamping force can be applied to the mold 140.

When the mold 140 is closed as described above, the injection plunger 122 is
1 projects into the material measuring chamber 123b into which a predetermined amount of the molding material is introduced, extrudes the molding material in the material measuring chamber 123b, and transfers the molding material from the injection nozzle 125 to the mold 1.
Inject into 40.

On the other hand, in the material supply section 110, the supply screw 112 starts rotating in parallel with or after the injection operation described above. Then, after the above-described injection operation, the injection plunger 122 is pushed up by the pressure of the molten resin pushed forward by the screw. At this time, the injection cylinder 121 is moved to the material measuring chamber 123b.
In order to release the gas of the molten resin inside and increase the density of the molten resin, pressure is applied simultaneously from above and below so that a slight force is applied downward. A detection member that moves together with the injection plunger 122 is attached to the base of the injection plunger 122, and the measurement confirmation sensor 124 detects the position of the detection member. At the time when is introduced into the material measuring chamber 123b, the supply screw 112 is stopped, and the pressurization of the injection cylinder is stopped.

Next, when the molding material in the mold 140 into which the molding material has been injected as described above is solidified, the mold clamping cylinder 134 first releases the mold clamping lever 136, and presses the mold driving cam 132. After the pressure is released, the mold driving cylinder 131 operates to retract the mold driving cam 132 and release the lower mold attaching member 133. Thereafter, the auxiliary cylinder 137 operates to lower the lower mold 142, and the mold is moved. 140
Is opened.

As described above, the mold driving cam 132 is operated before or after the pressing force of the mold clamping cylinder 134 by the mold clamping lever 136 is released, or after the pressing force is released. It is possible to reduce abrasion and other damage between sliding surfaces with the driving guide surface 136c.

Here, the time from the operation of the mold clamping cylinder 134 to the operation of the mold driving cylinder 131 is measured by a timer (not shown).
Preferably, the mold driving cylinder 131 is operated after the mold driving cam 132 is completely released. In this way, the operation of the mold driving cam 132 by the mold driving cylinder 131 is more reliably performed without the pressing force from the mold clamping cylinder 134.

Finally, the molded product is taken out of the mold 140, and the mold clamping operation is performed again as described above. Thereafter, the molding operation is repeatedly performed as described above.

As described above, in the present embodiment, the gap 113a is provided between the heating area of the supply cylinder 113 by the heater 113d and the material charging section in which the material supply port 113c is formed. Because it is possible to prevent overheating of the material input section without deteriorating the temperature distribution in the heating area, it is possible to prevent a problem such that the molding material such as pellets is melted and the material input becomes impossible, and to achieve a stable operation. A plasticizing treatment of the molding material can be performed.

Further, since the both sides of the gap 113a are constituted by the first cylinder member 113A and the second cylinder member 113B, respectively, the heating area by the heater 113d at the tip side of the gap 113a and the gap Part 1
Since the materials of the two cylinder materials can be selected according to the respective temperature environments required near the material supply port 113c on the base end side of 13a, more excellent material supply characteristics can be realized.

In this embodiment, the depth d (the distance from the outer peripheral surface of the supply cylinder 113 to the bottom of the gap 113a) of the gap 113a and the gap formed in the axial direction of the supply cylinder 113 by the gap 113a. The larger the value of g, the higher the heat insulation. But the depth d
When the gap g increases, the rigidity of the supply cylinder 113 decreases. Therefore, the outer diameter of the supply cylinder 113 is set to O
D, where ID is the inner diameter of the supply cylinder 113 (the inner diameter of the material supply path), the depth d is preferably not less than 1/6 · (OD-ID) and not more than 1/3 · (OD-ID). , The gap g is equal to or more than ５ · (OD-ID-d),
It is preferable that it is 5 * (OD-ID-d) or less. If it exceeds the above range, it becomes difficult to secure the rigidity of the supply cylinder 113, and if it falls below the above range, the heat insulating effect becomes small.
Here, in the supply cylinder, it is preferable to install the supply cylinder so that both sides of the gap are supported by a support member such as a frame (not shown) in order to prevent damage to the bottom of the gap 113a.

In the case of the present embodiment, in order to reduce the size of the entire apparatus, the supply cylinder 113 of the material supply unit 110 is shortened, and the supply screw 112 is set to L / D (effective supply screw length / supply screw diameter) = Ten of them were used. In the present embodiment, since the uniformity and stability of the temperature of the heating region are excellent, even if the length of the material supply unit 110 in the material supply direction is shortened as described above, the deterioration or variation in the quality of the molded product is reduced. There was no occurrence, and it was possible to produce a molded article stably. The above L / D is 8 to 1
It is preferably within the range of 5. L / L
When D is lower than the above, it becomes difficult to uniformly melt the material or reduce the variation in the temperature of the molten material, and the molding quality deteriorates. When L / D exceeds the above range,
As the length of the material supply unit 110 increases and the size of the apparatus increases, the residence time of the heated molding material increases,
It also affects the molding quality.

It should be noted that the injection molding apparatus of the present invention is not limited to the illustrated example described above, and it is needless to say that various modifications can be made without departing from the spirit of the present invention. In order to enhance the heat insulating effect of the gap 113a, the following measures may be taken. 1) For example, in the above embodiment, in the above embodiment, the void 113 dug down from the outer periphery of the supply cylinder 113
Although a is exposed to the surroundings as it is, an appropriate heat insulating material may be inserted into the space 113a. 2) Further, a gas may be provided in the gap portion 113a to perform heat insulation. As the gas, it is preferable to use air or an inert gas such as nitrogen or argon, and it is most preferable to use air from the viewpoint of availability and cost.
Further, the insulation may be performed in a vacuum state reduced in pressure from the atmospheric pressure. In addition, cooling (radiation) of the second cylinder material 113B
The following measures may be taken to enhance the effect. 3) It is preferable to provide uneven portions 113e for heat radiation on the outer periphery of the second cylinder member 113B. The uneven portion 113e
More preferably, it is composed of a plurality of irregularities.
The shape of e may be an annular groove, a spiral or swirling groove, or a bag-like hole. As the number of irregularities increases, the surface area of the outer periphery increases, so that the cooling (radiation) effect becomes greater. 4) In addition, the second cylinder material 113
In order to improve the thermal conductivity of the surface of B, a surface treatment may be performed. Silver plating, copper plating, diamond coating, and the like are preferable. Particularly, diamond has the highest thermal conductivity, so that the effect of radiating heat from the surface is enhanced. 5) As the cooling means, a fluid may be circulated inside the material charging section, or a heat radiation uneven portion may be provided on the outer periphery of the material charging section, or both may be used in combination. Then, the heat insulating effect of the cavity 113a and the second cylinder material 113
In order to further enhance the synergistic effect with the heat radiation effect of B, the above 1) to 5) may be appropriately combined.

The present embodiment has a material supply section for dissolving and supplying the molding material and an injection mechanism for injecting the molding material into the molding die. The mold clamping mechanism includes the material supply section and the injection mechanism. Since it is disposed so as to overlap with the mechanism section in a plane, the entire injection molding machine can be made compact and the injection molding machine can be made into a desktop type. As a result, the injection molding machine can be hand-carried, and injection molding can be performed at a mass retailer in repair and replacement of plastic parts of portable equipment (watch, mobile phone, printer, etc.). Therefore, after-sales service can be improved. In other words, in the past, injection molding machines were too large to be fixed on the ground and could not be carried around, so there was no other way than to order them one by one at a specialized molding factory. And the repair schedule can be shortened. Furthermore, injection molding machines can be arranged in the assembly line of portable equipment (watches, mobile phones, printers, etc.), making it possible to integrate parts supply and assembly, eliminating the need for temporary storage space for parts. It became possible to do it. Further, in the present embodiment, since the mold clamping mechanism is disposed below the material supply unit and the injection mechanism, the work of replenishing the molding material is facilitated and the molding workability is improved. Note that the injection molding apparatus of the present invention is not limited to the illustrated example described above, and it goes without saying that various changes can be made without departing from the spirit of the present invention. For example, in the above embodiment, the mold driving cam 132 and the mold clamping lever 136 are configured to come into direct contact with each other and to be guided and pressurized. Another member that can transmit pressure and can perform guide support may be provided between them. Also, the mold driving cam 1
At least one of the mold lever 32 and the mold clamping lever 136 may be constituted by an assembly of a plurality of members. Further, in the present embodiment, the injection mechanism 12
A screw prepra system in which 0 is provided outside the supply cylinder is used. This is effective in reducing the load on the supply cylinder, and in the case of a supply cylinder having a gap as in the present embodiment, the depth and gap of the gap are increased because the load on the cylinder is small. This is advantageous in that it can be performed. However, the present invention is not limited to the above-described method, and includes other methods such as an in-line screw method in which a supply screw in a supply cylinder rotates and moves forward and backward (moves in an axial direction). No problem.

[0043]

As described above, according to the present invention,
By providing a gap between the material charging section and the heating means in the supply cylinder, heat generated by the heating means is blocked by the gap, thereby preventing overheating of the material charging section and in the vicinity of the gap. Has a large temperature gradient, while the temperature gradient on the material discharge side is reduced when viewed from the gap, so that the temperature of the molding material discharged from the material discharge portion is stabilized, and the quality and stability of the molded product are improved. As a result, the length of the heating region in the material supply direction can be reduced, so that the device can be downsized.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram showing an overall configuration of an embodiment of an injection molding apparatus according to the present invention.

FIG. 2A is a partial configuration diagram illustrating a state in which a mold is in a mold-opening state and a partial configuration diagram illustrating a state in which the mold is in a mold-clamping state in the mold clamping mechanism unit of the embodiment. (B).

FIG. 3 is a schematic configuration diagram showing a more specific structure of a material supply unit and an injection mechanism unit in the embodiment.

FIG. 4 is an enlarged cross-sectional view of a material supply unit according to the first embodiment.

FIG. 5 is a schematic flowchart showing an operation procedure in the embodiment.

[Explanation of symbols]

 REFERENCE SIGNS LIST 100 Injection molding device 110 Material supply unit 111 Hopper 112 Supply screw 113 Supply cylinder 113a Void 113b Cooling pipe 113c Supply port 113d Heater 113e Concavo-convex part 113A First cylinder material 113B Second cylinder material 117 Drive motor 120 Injection mechanism 121 Injection cylinder 122 Injection plunger 123 Injection block 123a Material supply path 123b Material weighing chamber 124 Measurement confirmation sensor 125 Injection nozzle 130 Mold clamping mechanism 131 Mold drive cylinder 132 Mold drive cam 133 Lower mold attachment member 134 Mold clamp cylinder 135 Rotating shaft 136 Clamping lever 136a Drive guide surface 137 Auxiliary cylinder 140 Mold 141 Upper die 142 Lower die

 ──────────────────────────────────────────────────続 き Continuing from the front page (72) Ryoichi Matsumoto 3-3-5 Yamato, Suwa City, Nagano Prefecture Seiko Epson Corporation (72) Inventor Yasuyuki Kitazawa 1490-4 Kambayashi, Matsumoto City, Nagano Prefecture Justy Limited Company F term (reference) 4F206 JA07 JD03 JF01 JL02 JN43 JQ41 JQ46 JQ48

Claims (8)

[Claims] 1. An injection molding apparatus configured to produce a molded product by injecting a molding material into a molding die, comprising: a material supply unit that supplies the molding material in a heated and melted state. A material supply section for supplying the undissolved molding material, a material supply path extending from the material supply section, a material discharge section provided at a tip of the material supply path, and the material supply section. A supply cylinder provided with a heating means for heating the molding material moving in a path, and a material moving means for moving the molding material along the material supply path; An injection molding apparatus, wherein a gap is provided between a material charging section and the heating means. 2. The injection molding apparatus according to claim 1, wherein the gap has a structure dug down from the outer peripheral surface of the supply cylinder toward the center. 3. The injection molding apparatus according to claim 1, wherein the gap is disposed in a circumferential direction of the supply cylinder. 4. The semiconductor device according to claim 1, wherein a tip side portion of the material discharge unit side with respect to the gap portion, and a base end side portion of the material input side with respect to the gap portion. An injection molding apparatus characterized in that is formed of a separate member. 5. The injection molding apparatus according to claim 4, wherein the distal end portion and the proximal end portion are configured to fit at the bottom of the gap. 6. The injection molding apparatus according to claim 1, wherein cooling means is provided between the material charging section and the gap. 7. The injection molding apparatus according to claim 1, wherein a gas is provided in the gap to perform heat insulation. 8. An injection molding apparatus according to claim 6, wherein said cooling means has a heat radiating projection and a depression.