JPH04339630A - Composite cylinder with hole and its manufacture - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of manufacturing a perforated composite cylinder.

0002

2. Description of the Related Art A plastic injection/extrusion molding machine has a material supply hole 15 on the base end side, as shown in FIG. , a pressure feeding means 1 such as a screw or a plunger
A heater 19 is provided on the outer periphery of the cylinder body 17 at an interval in the axial direction.

[0003] In this molding machine, a thermoplastic or thermosetting resin is supplied through a material supply hole 15, heated and fluidized by a heater 19, and molded by pressure feeding means 18 to a die. Here, the cylinder body 17 is a composite cylinder in which a corrosion-resistant and wear-resistant lining layer 20 is provided on the inside thereof, and the lining layer 20 is provided not only on the inner surface of the main body but also in the supply hole 15 and the vent hole 16.

This is because in the supply hole 15, wear occurs due to the glass filler contained in the plastic, and in the vent hole 16, corrosive gases in the resin and additives, such as heated various hydrocarbons,
This is because corrosion occurs due to volatile gases such as monoxide or corrosive gases such as halogen acids. For this reason, the above-mentioned composite cylinder has been manufactured, for example, by the HIP technique disclosed in Japanese Patent Application Laid-Open No. 1-191701.

[0005]

However, in the prior art disclosed in the above-mentioned publication, since the lining layer is made of a material that is difficult to cut, only simple circular supply holes 15 and vent holes 16 that can be machined are formed. The problem was that the functionality of the system was significantly impaired. In addition, the aforementioned holes 15 and 16
If the cylinder is made into an elliptical, inverted tapered, spectacle-shaped, rectangular shape, etc. in order to ensure this function, the shrinkage deformation of the main body during HIP processing becomes uneven deformation, causing problems such as the cylinder being warped.

[0006] The present invention provides a perforated composite cylinder in which the supply hole and the vent hole are shaped in accordance with these functions, and also satisfies corrosion resistance and wear resistance. The purpose is to manufacture accurately.

[0007]

[Means for Solving the Problems] The present invention takes the following technical means to achieve the above object. That is,
The present invention is a composite cylinder that has a corrosion-resistant and wear-resistant lining layer formed by HIP treatment on the cylinder base material surface and has radial holes, and has a base surface treatment layer of an active metal on the wall surface of the hole. It is characterized by having an electroless ceramic treatment layer on the treatment layer. Further, the present invention provides a composite cylinder in which a corrosion-resistant and wear-resistant lining layer is formed on the cylinder base material surface by HIP treatment, a hole is formed in the composite cylinder, and the surface of the hole wall surface of the hole is treated with an active metal. It is characterized in that it is subsequently subjected to electroless ceramic plating treatment.

[0008]

[Operation] According to the present invention, the holes 5 and 6 of the composite cylinder 4 are not coated with a lining layer formed by HIP processing, but are coated with ceramics to ensure wear resistance and corrosion resistance, so that the shapes of the holes 5 and 6 are , it can be made not only circular but also oval, reverse tapered, etc. with emphasis on function.

[0009]

Embodiments Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 shows the manufacturing process of the perforated composite cylinder according to the present invention, in which the base material surface 2 of the cylinder body 1 created by casting, forging, etc. is coated with corrosion-resistant and wear-resistant materials such as Ni-based and Co-based materials. The lining layers 3 are diffusion bonded by HIP processing to form a composite cylinder 4. The composite cylinder 4 can be created by HIP using the same technique as the prior art described above or by a commonly known HIP technique.

In this composite cylinder 4, a material supply hole 5 and a vent hole 6 are formed in the cylinder body 1 by end milling and electric discharge machining. Here, the shape of the holes 5 and 6 can be easily and accurately machined, not only in a simple circular shape but also in a complex shape that performs the hole function. Next, the composite cylinder 4 whose entire surface was masked except for the holes 5 and 6 was placed in an ion plating vapor deposition tank 8 equipped with an electrode 7 of active metal such as Ti, Zr, etc., and vacuum was applied to 10-3 to 10-4. After degassing, plating is carried out for about 2 hours under conditions of 10 volts and 200 to 500 amperes, with the cylinder 4 as the positive pole and the vapor deposition tank 8 as the negative pole, thereby depositing 5 to 10 μmm of active metal on the hole walls of the holes 5 and 6. Perform base surface treatment by.

[0011] Here, if the base surface is less than 5 μmm, the deposited film will be incomplete, and if it is more than 10 μmm, it will peel off. Layer 3 can also be applied. Next, the composite cylinder 4 whose base surface has been treated is thoroughly washed and then placed in an electroless tank containing a solution 9 in which 25 to 45% by weight of a highly hard and corrosion-resistant ceramic such as SiO2 or Al2O3 is suspended. Soak in 10, approx. 2-12
A ceramic plating layer 11 with a thickness of 5 to 100 μm was formed by electroless treatment for a period of time, and after this treatment, a predetermined finishing step was carried out to obtain a composite cylinder with holes.

Referring to FIGS. 2 to 7, various shapes of the supply hole 5 and the vent hole 6 are illustrated, and for the supply hole 5, when the screw rotates in the direction of the arrow, the material, that is, the resin is absorbed. 3, 5, and 7, the hole 5 is formed into a shape with extremely high resistance to wear. Therefore, the above-mentioned ceramic plating layer 11 is formed on the wall surface of the hole 5 to improve wear resistance. Improving.

Furthermore, when the screw rotates in the direction of the arrow, the vent hole 6 is formed to be narrow in the direction of rotation and long in the axial direction, so that less resin blows out and a large amount of gas can be absorbed. Because of this,
Since corrosion resistance is required, the above-mentioned ceramic plating layer 11 is formed on the hole wall surface of the vent hole 6 to improve the corrosion resistance.

Furthermore, FIG. 8 shows a case 2 in which the chamber is shaped like a spectacle.
A shaft-type composite cylinder 4 is illustrated, and a ceramic plating layer 11 is formed in a supply hole 5 that communicates with a chamber provided with a lining layer 3. Example: SU with an inner diameter of 36 cm, an outer diameter of 110 cm, and a length of 900 cm.
A specific example of a cylinder made of S will be described.

[0015] On the base material surface of the cylinder body, Ni base,
Co groups were diffusion bonded by HIP treatment to form the lining layer. A supply hole and a vent hole were formed in this composite cylinder by machining, and the cylinder was finished by electrical discharge machining to obtain the shapes shown in FIGS. 1, 2, and 3. The entire surface except the vent hole and supply hole was masked, and the cylinder was placed in an ion plating vapor deposition tank using a Ti electrode, and the cylinder body was set as the positive pole and the Ti electrode as the negative pole.
By performing a vapor deposition process at 00 to 500 amperes for about 2 hours, a 7 μm thick Ti underlayer was obtained.

[0016] After that, sufficient cleaning was performed to reduce SiO2 to 25%.
When immersed in a solution containing ~45% by weight of Si and subjected to electroless plating for about 7 hours, a 60 μmm thick Si
An O2 plating layer was obtained. Using this composite cylinder,
Strong corrosive gas generation and 45% glass fiber by weight
As a result of about 6 months of field testing of injection molding using PPS resin, it was confirmed that it was very effective in terms of the wear resistance of the supply hole and the corrosion resistance of the vent hole without causing any damage.

[0017]

[Effects of the Invention] The present invention is as described above, and since a ceramic plating layer is applied to the wall surfaces of supply holes, vent holes, etc., instead of a lining layer by HIP treatment, H.
It is possible to obtain a composite cylinder with holes that can fully exhibit the functionality of the holes without causing uneven deformation due to IP treatment.

[0018] Furthermore, it has been confirmed that the ceramic plating layer has superior corrosion resistance and wear resistance compared to the lining layer, and as a result, the degree of freedom in machining the hole shape is large, making it possible to create a composite cylinder with holes that has excellent corrosion and wear resistance. can be obtained.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram showing the manufacturing process of a composite cylinder with holes.

FIG. 2 is a sectional view showing a portion of a vent hole.

FIG. 3 is a sectional view showing a portion of a supply hole.

FIG. 4 is a cross-sectional view showing portions of vent holes having different shapes.

FIG. 5 is a cross-sectional view showing portions of supply holes having different shapes.

FIG. 6 is a cross-sectional view showing portions of vent holes having different shapes.

FIG. 7 is a cross-sectional view showing portions of supply holes having different shapes.

FIG. 8 is a sectional view showing a supply hole of a biaxial composite cylinder.

FIG. 9 is a sectional view of a conventional example showing a part of an injection molding machine.

[Explanation of symbols]

1 Cylinder body 2 Base material surface 3 Lining layer 4 Composite cylinder 5 Supply hole 6 Vent hole 11 Ceramic plating layer

Claims (2)

[Claims] 1. A composite cylinder having a corrosion-resistant and wear-resistant lining layer formed by HIP treatment on the cylinder base material surface and having radial holes, the cylinder having a base surface treatment layer of active metal on the wall surface of the holes, and A perforated composite cylinder characterized by having an electroless ceramic treatment layer on the treatment layer. 2. A composite cylinder in which a corrosion-resistant and wear-resistant lining layer is formed on the cylinder base material surface by HIP treatment, a hole is formed in the composite cylinder, and after the base surface is treated with an active metal on the hole wall surface of the hole. , a method for manufacturing a composite cylinder with holes, characterized by subjecting it to electroless ceramic plating treatment.