JPH0242415Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a mold for forming a resin tube.

There is a centrifugal mold as a mold for resin pipes, and although straight pipes can be easily molded using this mold, the structure and operation become complicated when molding a retractor pipe whose outer diameter and inner diameter change.

An object of the present invention is to provide a mold that is simple in structure and operation and that can easily mold a resin tube.

In order to achieve the above object, the molds for the resin tube of the present invention include a large-diameter outer mold having a large-diameter molding inner surface and a tapered inclined molding inner surface, and a small-diameter outer mold having a small-diameter molding inner surface. an outer mold connector that connects and separates both outer molds with the inclined molded inner surface therein; and a large diameter molded outer surface and a tapered inclined molded outer surface that can be freely inserted into and removed from the larger diameter outer mold. a large-diameter inner mold that can be inserted into the small-diameter outer mold and has a small-diameter molded outer surface, and an inner mold that connects and separates both inner molds with the inclined molded outer surface therein. a connecting tool; a flange-shaped lid plate that is provided on the outer surface of the intermediate portion of both inner molds and can freely come into contact with the end surface of the corresponding outer mold;
A nut body that can freely come into contact with these cover plates and is externally screwed into the end of the corresponding outer mold, and a stopper plate that is attached to the outer ends of both inner molds and faces the outer surface of the corresponding nut body. , consists of a resin supply port provided on one of the inner molds and an air vent provided on the other, and the distance between the outer mold of the nut body and the free movement generated between the corresponding nut body and the stopper plate is It is configured with a long screwing distance.

According to the configuration of the present invention, both outer molds are connected by an external connector, and while the inner mold is inserted into both outer molds, the nut body is screwed to the end of the outer mold, and the cover plate is connected to the end surface of the outer mold. The mold can be assembled by pressing the two inner molds together and connecting the two inner molds using the inner mold connector. After assembling in this manner, the resin tube can be molded by press-fitting resin into the space created between the outer mold and the inner mold through the resin supply port. Demoulding after the resin tube has hardened is as follows:
First, the inner mold connector is removed, and the nut body is unscrewed to bring the outer surface into contact with the stopper plate, and the inner mold is pulled out at the beginning by unscrewing the nut body, and This can be done by completely pulling out the inner mold after the threading is completed, then removing the outer mold connector, and then pulling out the outer mold from the resin tube.

An embodiment of the present invention will be described below with reference to the drawings. Reference numeral 1 denotes a large-diameter outer mold having a large-diameter molded inner surface 1a and a tapered inclined molded inner surface 1b. A flange portion 1A is integrally formed. Reference numeral 2 denotes a small-diameter outer mold having a small-diameter molded inner surface 2a, and a flange portion 2A is integrally formed at the connecting end thereof. 3 is an outer mold connector for connecting and separating both outer molds 1 and 2 with the inclined molding inner surface 1b inside;
It is composed of a bolt that passes through a through hole 4 formed in the flange part 2A and is screwed into a female screw part 5 formed in the flange part 1A. In order to ensure the connection, a positioning pin 6 is provided on the flange portion 2A, and a positioning hole 7 into which the positioning pin 6 can fit is formed in the flange portion 1A. Reference numeral 8 denotes a large-diameter inner mold that can be inserted into and removed from the large-diameter outer mold 1 and has a large-diameter molded outer surface 8a and a tapered inclined molded outer surface 8b, and has a large-diameter mold formed on the intermediate outer surface thereof. A flange-shaped lid plate 8A that can freely come into contact with the end surface of the outer mold 1 is integrally provided. Reference numeral 9 denotes a small-diameter inner mold that can be inserted into and removed from the small-diameter outer mold 2 and has a small-diameter molding outer surface 9a, and has a flange-shaped lid plate on the outer surface of the intermediate portion thereof that can freely come into contact with the end surface of the small-diameter outer mold 2. 9A is provided integrally.
Reference numeral 10 denotes an inner mold connector that connects and separates both inner molds 8 and 9 with the inclined molding outer surface 8b inside, and connects the large diameter inner mold through a through hole 11 formed on the axis of the small diameter inner mold 9. It is composed of a bolt that is screwed into a female threaded portion 12 formed in 8. Numerals 13 and 14 are nut bodies that are externally fitted onto the ends of both outer molds 1 and 2, and on the inner surface of the outer ends thereof, protrusions 13A and 14A are provided which can freely come into contact with the cover plates 8A and 9A from the outside. are integrally formed. 1
Stopper plates 5 and 16 are screwed onto the outer ends of the inner molds 8 and 9, and are opposed to the outer surfaces of the nut bodies 13 and 14. A resin supply port 17 is formed in the large-diameter inner mold 8, and an air vent port 18 is formed in the small-diameter inner mold 9. The screwing distance L of the nut bodies 13, 14 with respect to the outer molds 1, 2 is set to be larger than the free movement distance l generated between the nut bodies 13, 14 and the stopper plates 15, 16. In addition, nut body 1
The outer peripheral surfaces of 3 and 14 are knurled.

The action will be explained below. First, the assembly of the mold will be described. Both flange parts 1A and 2A are brought into contact with each other,
By connecting with the outer mold connector 3, both outer molds 1,
Connect and fix 2 in a straight line. Then, the inner molds 8 and 9 are inserted into both the outer molds 1 and 2, respectively, and the nut bodies 13 and 14 are externally screwed onto the ends of the outer molds 1 and 2 from the middle thereof. By screwing together the nut bodies 13 and 14, the inner molds 8 and 9 are further inserted, and their opposing surfaces abut. At the same time, the cover plates 8A, 9A come into contact with the end surfaces of the outer molds 1, 2 and press them through the protrusions 13A, 14A. In this state, the inner connector 10 is inserted into the through hole 11, and its tip is screwed into the female screw portion 12 to further secure the connection. As a result, the mold is assembled as shown in FIG. Next, resin is press-fitted from a resin supply device into the space created between the outer molds 1, 2 and the inner molds 8, 9 through the resin supply port 17. At this time, air is removed through the air vent 18 using a vacuum pump or the like. After the space is completely filled with resin, the supply is stopped, and the mold is heated to harden the resin, thereby molding the resin tube.
Demolding is then performed. That is, first, the inner mold connector 10 is operated to disconnect, and the connection between both the inner molds 8 and 9 is separated. Then, the nut bodies 13 and 14 are unscrewed. Then, the free movement distance l gradually disappears, and finally the stopper plates 15 and 16 come into contact. At this time, since the free movement distance l<screwing distance L, the screwing state of the nut bodies 13 and 14 to the outer molds 1 and 2 continues. By further unscrewing the nut bodies 13, 14 so as to completely release the screwing, the inner molds 8, 9 are started to be pulled out via the stopper plates 15, 16. When the nut bodies 13 and 14 are completely unscrewed, the extraction of the inner molds 8 and 9 is temporarily stopped. After that, both inner molds 8 and 9 are completely extracted. Next, as shown in FIG. 2, both outer molds 1,
The mold can be removed by pulling out the retirer resin tube 19 from 2. In addition, when demolding, both outer molds 1 and 2
This may be performed integrally, or may be performed after the outer mold connector 3 is detached and separated.

Before performing the above-described assembly, by applying pigmented resin to the molded inner surfaces 1a, 1b, 2a of the outer molds 1, 2, a resin tube 19 having a colored outer surface can be obtained. You can also include a Surf Ace mat if necessary. Furthermore, with respect to the molded outer surfaces 8a, 8b, 9a of the inner molds 8, 9 before insertion,
It may be coated with a touch-resistant resin or wrapped with surf ace mat or roving cloth.

According to the configuration of the present invention described above, the following effects can be expected. That is, both outer molds are connected by an outer mold connector, and while inserting both inner molds into both outer molds, the nut body is screwed to the end of the outer mold, and the cover plate is pressed against the end surface of the outer mold. At the same time, the mold can be assembled by connecting both inner molds with an inner mold connector. After assembling in this manner, the resin tube can be molded by press-fitting the resin into the space created between the outer mold and the inner mold through the resin supply port and hardening it. To remove the mold after the resin tube has hardened, first remove the inner mold connector, then unthread the nut body to bring the outer surface into contact with the stopper plate, and then unthread the tube. The inner mold is pulled out at the start of the operation, the inner mold is completely pulled out after screwing is completed, the outer mold connector is detached, and the outer mold is pulled out from the resin tube. be able to. Thereby, the reducer resin tube can be easily molded while having a simple structure and operation.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention; FIG. 1 is a longitudinal sectional front view when assembled, and FIG. 2 is a longitudinal sectional front view when demolded. 1...Large-diameter side outer mold, 1a...Large-diameter molded inner surface, 1
b...Incline molded inner surface, 1A...Flange part, 2...
...Small diameter side outer mold, 2a...Small diameter molded inner surface, 2A...
Flange portion, 3... Outer connector, 4... Through hole,
5...Female screw portion, 6...Positioning pin, 7...Positioning hole, 8...Large diameter side inner mold, 8a...Large diameter molded outer surface, 8b...Slope molded outer surface, 8A...Lid plate, 9
...Small diameter inner mold, 9a...Small diameter molded outer surface, 9A...
... Lid plate, 10 ... Inner mold connector, 11 ... Through hole,
12... Female screw part, 13, 14... Nut body, 1
3A, 14A...Protruding portion, 15, 16...Stopper plate, 17...Resin supply port, 18...Air vent port, 19...Register resin pipe, l...Freezing distance, L...Screwing distance.

Claims (1)

[Scope of utility model registration request] A large-diameter outer mold having a large-diameter molded inner surface and a tapered inclined molded inner surface, a small-diameter outer mold having a small-diameter molded inner surface, and an outer mold that connects and separates both outer molds with the inclined molded inner surface inside. a mold connector, a large-diameter inner mold that can be inserted into and removed from the large-diameter outer mold and has a large-diameter molded outer surface and a tapered sloped molded outer surface; A small-diameter inner mold having a flexible and small-diameter molded outer surface, an inner mold connector that connects and separates both inner molds with the inclined molded outer surface therein, and a corresponding outer mold provided on the outer surface of an intermediate portion of both inner molds. A flange-shaped cover plate that can freely come into contact with the end faces of the body, a nut body that can come into contact with these cover plates and that is externally screwed into the corresponding end of the outer mold, and a nut body that is attached to the outer ends of both inner molds. between the corresponding nut body and the stopper plate. 1. A mold for a resin tube, characterized in that the threading distance of the nut body with respect to the outer mold is set to be large compared to the free movement distance that occurs in the mold.