JPH0664828U - Injection molding machine - Google Patents

Abstract

(57) [Summary] [Purpose] To provide an injection molding machine that can perform purging work without trouble. [Structure] Since a purge cover 11 for blocking the both is fixed between the fixed platen 2 and the injection unit 7, the fixed platen 2 and the injection unit 7 can be blocked by the purge cover 11 during purging. The molten resin discharged from the nozzle 9 of the unit 7 can be received by the purge cover 11.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an injection molding machine that performs plastic molding.

[0002]

[Prior art]

 With an injection molding machine that injects molten resin from the injection unit into the mold to perform the desired molding, the resin remaining in the heating cylinder is discharged when molding is stopped, and the resin molten state is maintained when molding begins. In order to confirm, perform the work called purging with the injection unit retracted.

[0003]

[Problems to be solved by the device]

 Conventionally, the above purging is performed with the bencot pushed into the locate ring of the fixed-side template, but it is difficult to remove the bencot after the purged resin (hereinafter referred to as purge resin) has solidified. There is also a problem that it takes time to remove the purge resin attached to the locate ring and the platen.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide an injection molding machine that can perform a purging operation without trouble.

[0005]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, in the present invention, a purge cover that blocks the two is slidably arranged between the fixed platen on which the fixed mold plate of the injection molding machine is attached and the injection unit.

[0006]

[Action]

 Purging in the injection molding machine according to the present invention is performed with the purge cover slid to block the fixed platen and the injection unit with the purge cover, and the molten resin flows from the injection unit nozzle toward the purge cover. Is released. On the other hand, injection molding is performed by sliding the purge cover to retract from the above position, advancing the injection unit, and connecting the nozzle to the locate ring of the stationary mold plate.

[0007]

【Example】

 1 to 4 show an embodiment of the present invention. FIG. 1 is a side view of a main part of an injection molding machine showing a purging state, and FIG. 2 is a side view of a main part of an injection molding machine showing an injection state. 3 is a side view of the purge cover, and FIG. 4 is a top view of the purge cover.

In FIG. 1, 1 is a bed, 2 is a fixed plate fixedly arranged on the bed 1, and the fixed plate 2 has a conical nozzle insertion hole 4 a at its center. Reference numeral 3 is a plurality of tie bars arranged through the fixed board 2, and 4 is a movable board slidably provided on the tie bar 3. Reference numeral 5 is a fixed-side template fixed to the stationary platen 2. The fixed-side template 5 has a locate ring 5a located in the nozzle insertion hole 4a. 6 is a movable-side template fixed to the movable platen 4, 7 is an injection unit, and the injection unit 7 includes a heating cylinder 8 and a nozzle 9.

Reference numeral 10 denotes a pair of L-shaped stainless steel guide plates, which are fixed in parallel to the left and right sides of the ejection unit side of the fixed platen 4 with a nozzle insertion hole 4a interposed therebetween. Both guide plates 10 have a guide hole 10a extending in the vertical direction. The guide hole 10a has an upper end portion and a substantially middle portion which are inclined downward toward the fixed platen 2 (inclination of 45 °). The support hole 10b is provided continuously.

Reference numeral 11 denotes a U-shaped stainless steel purge cover, and the central wide surface 11 a is inclined downward toward the fixed platen 2 side. The purge cover 11 is slidably inserted into the guide holes 10a of the guide plate 10 through sliding rods 12 provided above and below both end faces 11b, and is attached to the guide plate 10 so as to be vertically slidable. A nut 12a is fastened to the threaded portions on both ends of the sliding rod 12, and the slide resistance can be adjusted by the fastening strength of the nut 12a. Further, the vertical distance between the sliding rods 12 matches the vertical distance between the support holes 10b.

Reference numeral 13 denotes a tray in the shape of a flat container for receiving the purge resin, which is detachably arranged under the purge cover 11 on the bed 1.

When discharging the resin remaining in the heating cylinder when the molding is stopped, or when confirming the molten state of the resin when the molding is started, the injection unit 7 should be retracted as shown in FIG. The purge cover 11 is slid upward along the guide hole 10a, and at the upper limit position, the purge cover 11 is pushed toward the fixed platen 2 to insert both sliding rods 12 into the support holes 10b.

The purge cover 11 supports both sliding rods 12 at the lower limit position of the support hole 10b, and has a wide surface 11a between the fixed platen 2 and the injection unit 7, more specifically, the location ring 5a of the fixed-side template 5. And the nozzle 9 of the injection unit 7, and both are blocked by the wide surface 11a of the purge cover 11.

When purging is performed in this state, the molten resin discharged from the nozzle 9 of the injection unit 7 is received by the wide surface 11a of the purge cover 11 and falls to the tray 13 below it according to its inclination. Further, the purge resin remaining on the purge cover 11 is scraped off into the tray 13 by an appropriate jig. The purge resin in the tray 13 is taken out from the bed 1 and discarded. Since the purge cover 11 is made of stainless steel, it is not affected by heat and corrosion by the purge resin.

On the other hand, in the case of performing injection molding, the purge cover 11 is lifted in the state of FIG. 1 to move both sliding rods 12 from the support hole 10b to the guide hole 10a, and as shown in FIG. Is slid downward along the guide hole 10a to the lower limit position.

With the purge cover 11 retracted from the above position, the injection unit 7 is advanced to connect the nozzle 9 to the locate ring 5 a, and the molten resin is injected from the injection unit 7 into the mold. This injection molding is carried out in the same procedure as the conventional one.

As described above, in the above-described injection molding machine, the purge cover 11 that blocks the fixed platen 2 and the injection unit 7 is arranged slidably between the fixed platen 2 and the injection unit 7. If the purge cover 11 blocks the molten resin discharged from the nozzle 9 of the injection unit 7, the purge cover 11 can prevent the purge resin from adhering to the locate ring 5a or the fixed platen 2.

Further, since the purge resin received by the purge cover 11 can be dropped onto the tray 13 therebelow, the purge resin can be collectively discarded by using the tray 13 and the same operation can be performed extremely. It can be done easily.

Further, since the purge cover 11 is configured to be slidable in the vertical direction, a wide working space can be secured on both sides of the cover and workability can be improved.

In the above-mentioned embodiment, the U-shaped purge cover is shown, but the shape can be variously changed as long as it can block the fixed plate and the emission unit. The purge cover may be slidable in the left-right direction, and the slide mechanism may be the one shown in the figure.

[0021]

[Effect of device]

 As described in detail above, according to the present invention, if the fixed platen and the injection unit are shielded by the purge cover during purging, the molten resin discharged from the nozzle of the injection unit can be caught by the purge cover. The resin can be prevented from adhering to the locate ring or fixed plate, and the same work can be performed accurately and without any problems.

[Brief description of drawings]

FIG. 1 is a side view of a main part of an injection molding machine showing a purging state.

FIG. 2 is a side view of an essential part of the injection molding machine showing an injection state.

FIG. 3 is a side view of the purge cover.

FIG. 4 is a top view of the purge cover.

[Explanation of symbols]

2 ... Fixed board, 5 ... Fixed side template, 7 ... Injection unit, 11
… Purge cover.

Claims (1)

[Scope of utility model registration request] 1. An injection molding machine, characterized in that a purge cover for blocking the fixed plate and the injection unit is slidably arranged between the fixed plate and the injection unit.