JPS5954535A - Mold for extrusion molding - Google Patents

Abstract

PURPOSE:To prevent frequent occurrence of abnormal products when production is restarted following the stoppage of discharge of products from the outlet of molds by a method in which a flow path branched from the midway of a flow path from the inlet of resin to the outlet of molds and leading to the discharge port is provided in the mold body, and a switch valve is provided at the branch point. CONSTITUTION:A flow path 2 leading from the inlet 1 of molten resin to the outlet 3 of a mold is provided in a mold body C, and a flow path 7 branched from the midway of the flow path 2 and leading to the discharge port 6 of resin is provided. A switch valve 8 leading alternately to both the paths 2 and 7 is provided at the branch point. The switch valve 8 is preferably made up of a rotary operating shaft with a notch or perforation leading to the flow paths 2 and 7. When the discharge of resin from the outlet 3 of the mold and production is stopped for any reason, the frequent occurrence of abnormal products due to the alteration of resin in the mold when production is restarted can thus be prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION Technical Field The present invention relates to an improvement in an extrusion mold for molding a desired product shape by discharging a molten resin from a mold outlet.

Back Technique 41 B Conventionally, when this type of molding mold C2 is installed, the molten resin to be injected into the mold body C (2) is injected into the mold body C (2) using a scree (not shown) via a C near adapter A, as shown in Figure 911. The mold is configured to discharge exclusively to the mold 1 and 3 through a flow path 2 that communicates with the mold. Although it was temporarily formed, the mold body was dark and it was accepted.
1-9. The resin that has been used for a long time has become carbonized or has deteriorated to the point where it becomes lumpy as if it had been contaminated with foreign matter. This deteriorated resin flows out from the mold outlet 3 for a considerable period of time depending on the relative volume ratio of the product and the accumulated resin as one step of waxing is started again, and -f:il is in the desired shape. Even if there is, the ability to dispose of it will be lost, leading to a decrease in manufacturing efficiency (
Two. Also, as in the molding shown in Fig. 2, when extruding a small amount of resin (Al4) onto a highly curved metal core material (a) made of stainless steel, etc., there is a risk of deterioration of the resin! ,”1 [~
/H) - If you have to discard 411 pieces of material over two long lengths, the cost of materials will increase. In order to save time and waste of this metal core material a, it is not sent out and deteriorates. Therefore, it is inevitable to avoid discarding the metal core ia.

Disclosure of No. 114 The present invention aims to improve the manufacturing efficiency of various extrusion molded products, and also to eliminate the waste of expensive materials such as metal cores as much as possible, by making it possible to separately extract deteriorated resin from IJ. The purpose is to provide a total of 7 extrusion molds configured to.

That is, in the extrusion mold according to the present invention, a channel 7 is provided which communicates with the discharge port in addition to the channel extending 1 m from resin receiving [1 to molding] 1, and the flow channel is controlled by a switching valve. It consists of mutually alternative ζ2 opening/closing i, iJ function C- (from 2, when re-operating (2 degraded trees can be discharged [] to θ).

Best Form for Carrying Out the Invention (4) To explain this based on Embodiment C2 shown in Fig. It has been identified that the adapter A with the Sono 1 injection channel 4 that communicates with the receiving L-11 is screwed on.In addition, the main body C of this mold has the intermediate plate CH, the end plate 1-C2
from the intermediate plate cH (two fixed, resin inlet)
(Two resin channels 2, 2a are formed, and the channels 2 and 2a are formed.)
, 2a (r continuous molding [13 all end plates C
The mold opening 3 is formed as an opening corresponding to the desired product shape. fia, 5b, 5c and the end plate C2. Also, the mold body C (- indicates the resin discharge port 6 and the resin receiving port l in the opposite direction from the mold outlet 3).
A flow path 7 is provided which communicates with -J fi@'2. This flow path 7 is connected to the flow path 2, which is connected to the TI axis so that the deteriorated resin can be discharged quickly (two times).
It is preferable to form it with a value shorter and larger than 2a. Furthermore (2. In the mold body C, there is a
(1) A switching valve 8 is provided.

This switching jP 8 is the mold body ci double shadow formation ~ through hole 9
It is composed of a rotary shaft 8 and a rotating shaft 17 which are fitted into each other.

This time 1 sales operation '+1+sa is on the axis (if you form 2 or cut out 8b, also connect that axis to i- through bearing H1, IQ)
Insert into the through hole 9 of the mold body C (after boiling) 11. # on the moon
, by fixing the waste, it rotates in the mold body C"f 1ji
s' is loaded twice. This operating shaft 8a may be provided with a notch 8bl and a through hole formed at an approximately IK angle (2) toward the center of the alternating shaft. As shown in Fig. 3, the operating shaft 8
When a is rotated clockwise, the notch 8b connects the resin inlet l and the mold outlet 3 through the flow path 2.
In order to completely close the flow path 7 connected to
As shown in Figure C, when the operating shaft 8a is rotated counterclockwise, the notch 81) is now reversed (=resin inlet), discharge port 6, and branch channel 7, and at the same time (each one resin Mold outlet 3 (deteriorated due to closing the two-way sliding flow path 2) P8 is the flow path By closing 2.7 mutually alternatively, it can be assumed that resin extrusion molding and sliding (=9). Figure 6-
? “Each of the 14 meetings can be applied.

In the fourth illustrated embodiment, in figure a, the IJ switching valve 12 is constructed from the M7+ rear direction (- sliding operation shaft + 2a) and the mold body C (- prisoner 4/buttocks? 2). There is C.

In this operation, there is a through hole 121 that communicates with the flow path 2 of the mold outlet.
), and a hole was opened at that 6i11 point (, 11
6. The through holes 12c communicating the flow path 7 of the resin receiving port 1 are provided separately (r'l-1d).
Stopper collars 12d and 2c are provided on the sliding end of 2a, so that the alignment position with each flow path can be specified. In this operation 111I] 12a, when the operation shaft 12a is slid until the stopper collar +2d hits the side surface of the mold body C, the through hole 12b opens the flow between the resin receiving 1"] and the mold outlet 3. Connecting channel 2 and at the same time through hole 1
Regular resin extrusion can be performed to offset 2c from channel 2. On the other hand, operate until the stopper collar 12e hits the side of the mold body C (slide i1112a,
The through hole] 7c now blocks the flow path 2 (61) and attaches an IMt fat discharge hole to connect the fat receiving hole 1 and the outlet 6 through the flow path 7.

In the embodiment 1+1J shown in FIG. 5,... the handle lever 13a
The pair of operating shafts 13b and +3c open and close each flow path 2 and 7 alternately with # and ¥r operation.
, being devoured. Each flow path 2.7 is provided with a branch in the longitudinal direction of the main body C.
・Tllll i3b, +3c performs upward opening and closing by protruding or retracting 2.7C each of Tanifusa U.

In addition, Yoshishige! llI+IfIlb 13111 can be configured with round or square bins.

In the sixth illustrated embodiment, the same IX)7(
2 Channels 2.7 branched into two in the vertical direction of the mold body C (a pair of screw shafts 14a capable of screwing in and unscrewing the two pairs)
By attaching 14b, a bright place]P+,i is configured. When the switching valve 14 is configured with this threaded shaft 1411.14b and the passage 2.7 is square, an auxiliary piece 14d that engages the protrusion 14e at the tip of 111 and the loose 11ρ is installed as shown in Figure 1. do it.

In the extrusion 2 molding & 1p configured in this way, when restarting operation after a temporary stop (2 is the switching valve H, 12° 13.
14 to receive the resin II 1 and 1'1 [preliminarily cut the flow path so that it communicates completely with the outlet 6. Driving 11
When the screw (shown in the figure -1") located above the adapter A is activated when the screw is opened, it accumulates in the flow path (
A fat!・This discharge is discharged from the mold body C through the discharge [2] 6 through the first flow path 7. Based on the illustrated embodiment of JI & 3-C Explanation 1. Since the flow path 7 is formed short and has a large diameter like fc, the time can be completed in less than j-+l.
Constant time curve curve, switching valve8. If you operate I2.13.14 again and switch to the flow path 2 that communicates the resin inlet 1 and the mold outlet 1'' 3, regular resin extrusion molding can be performed (2).

What..., at the start of this regular extrusion molding (2 is in the flow path 2 (2 residence points, and camellia 1 fat is discharged, but 11 (1 c) is 1 c and relatively (2 metal cores) It is possible to reduce the waste of lumber.
In E. 11, we showed the case where stainless steel core material a (-resin molded material 11 is attached, 1'1), but this (2 is limited to q (,1!"+1*Ir, r decorative fin 2 It can be widely applied to molds for simultaneously extruding aluminum strips, gold and 4-wire coatings, etc. at the same time.

Utilization of 4 nJ functions in this way (2. The present invention (depending on the 2-way extrusion mold)
．． By simply operating the switching valve, all of the degraded resin can be discharged out of the normal flow path, making it possible to reduce the generation of waste products, improving production efficiency and reducing material costs. It is something that can be understood.

[Brief explanation of the drawing]

Fig. 1 is a side sectional view of a conventional extrusion mold; Fig. 2 is a side sectional view of a conventional extrusion mold; 1. An explanatory diagram of an extrusion molding die according to one embodiment of the present invention, 1.5 and 6. The illustrations are another embodiment (2) An explanatory diagram of an extrusion molding mold according to another embodiment. C (cl , C2): Mold body, I: Acceptance [1, 2:
Flow path, 3: Molding "21.6: Discharge [", 7: tt path, IL 12.13. +4: Switching valve, 14ry: Rotation M production 11n! +, 8b: Notch f 1/4 through hole, 12a;
Slide operation axis, 121. +, +2c: Through hole or notch, +: la: 4'fi, operating lever, 13
b, C allowance c: Operating axis, 14a. 1・1b: Screw shaft. 1 Patent Treasurer Noomi Hashimoto / 'Guezuke Co., Ltd. Figure 2 b, Figure 3 b To person's thoughts 41] C person, 712 No. 5 [6th to] and Z no.

Claims (5)

[Claims] (1) In addition to forming a flow path communicating from the resin inlet to the mold outlet in the mold body, a flow path communicating with the resin discharge roller (2. An extrusion mold characterized in that it is equipped with a switching valve. (2) The extrusion mold according to item 1, wherein the switching valve is constituted by a rotary operating shaft having a notch or a through hole communicating with each flow path. (3) The extrusion j7 according to claim 31, wherein the switching valve is constituted by a slide operation shaft having a notch or a through hole communicating with each flow path at a different position on the axis.
Molding mold. (4) - Claim 1, which is comprised of a pair of actuators that selectively open each flow path by operating a lever. Extrusion mold as described in section. (5) The claim that the switching valve is constituted by a pair of threaded shafts that can be selectively screwed in or unscrewed (two threaded shafts that protrude to block or retreat and open each flow path) The extrusion mold as described in Section 1, 1ii2.