A welding apparatus (1) for radio-frequency, RF, welding, comprises: a clamp (10) having two electrodes (100, 101; 100′, 101′) being movable with respect to one another for clamping one or more items (2; 2′) therebetween for a welding process; and an RF power supply (11) for providing an RF welding current to the electrodes (100, 101; 100′, 101′) of the clamp (10), the RF power supply being adapted to change the frequency of the RF welding current during the welding process.

A method is provided for manufacturing flooring planks including a plastic base and an image plastic layer. The method includes a feeding step of feeding a layered raw material of a long decorative material to be rolled into oppositely rolling rollers; and a rolling step of hot rolling an embossing on the transparent plastic layer. A feeding tension of a printed plastic layer is adjusted according to a longitudinal deviation between the embossing and the pattern in the rolling step. The device includes a first feeding device, a second feeding device, the oppositely rolling rollers, a detecting device, and a tension controller disposed on the second feeding device. According to the long decorative material with the embossing in register with the pattern manufactured by the method, the embossing hot-rolled on the transparent plastic layer is in register with the pattern on the printed plastic layer.

This invention discloses a production method of inflatable toy. The first step is to prepare hard PVC powder and soft PVC paste resin. The second step is injection moulding of embedded parts and grasp parts. The third step is preparation of slushing mold or rotational molding mold. The fourth step is shaping of soft PVC paste resin. The fifth step is cooling and demoulding and then air inflation for modeling. The sixth step is installation of grasp parts and inspection and testing of qualified products; in this invention, the secondary forming of hard PVC embedded parts made through injection moulding, are moulded in soft PVC rubber part itself through rotational molding or slush molding in the rotational molding mold or slush molding mold. And then, the grasp parts and embedded parts are firmly connected through buckle or screw. The design has solved the problem of location design of the circular handle, which is unable to be installed in parts other than the joint line through traditional PVC rotational molding mold or slush molding mold. It has perfectly realized the grasp function. In addition, the installation of formed ears or other injection-moulding parts guarantees no deformation of the parts, and this presents a good revivification of product design.

According to one aspect of the present invention, provided is a method of attaching an emblem to a vehicle seat, the method including providing a seat and an emblem, the seat having an outer surface on which a coating layer is formed, removing the coating layer to correspond to an edge of the emblem, aligning the emblem with the seat to correspond to a portion in which the coating layer is removed, and attaching the emblem to the seat by pressing the emblem using a mold unit and applying a high-frequency current.

First, a composite preform 70 including a preform 10a and a plastic member 40a in close contact with the outer surface of the preform 10a is made by preparing the preform 10a made of plastic material and arranging the plastic member 40a to surround the outer surface of the preform 10a. Subsequently, the composite preform 70 is heated and inserted in a blow molding die 50 and undergoes blow molding in the blow molding die 50, by which the preform 10a and the plastic member 40a of the composite preform 70 are inflated integrally and a composite container 10A is obtained.

A long decorative material with an embossing in register with a pattern, a rolling method and a device therefor are described herein. The method comprises a feeding step of feeding a layered raw material of a long decorative material to be rolled into oppositely rolling rollers; and a rolling step of hot rolling an embossing on the transparent plastic layer. A feeding tension of a printed plastic layer is adjusted according to a longitudinal deviation between the embossing and the pattern in the rolling step. The device comprises a first feeding device, a second feeding device, the oppositely rolling rollers, a detecting device, and a tension controller disposed on the second feeding device. According to the long decorative material with the embossing in register with the pattern manufactured by the method, the embossing hot-rolled on the transparent plastic layer is in register with the pattern on the printed plastic layer. The method, device and the long decorative material with the embossing in register with the pattern processed thereby can implement the embossing on the transparent plastic layer in register with the pattern on the printed plastic layer and have high production efficiency, low cost and less energy consumption.

Provided are a hose excelling in a lightweight property and in fatigue fracture resistance, a method for manufacturing the hose, and a hydraulic pump. The hose includes a tube, an interior of the tube being hollow, continuous carbon fibers and/or continuous glass fibers wound around an outer circumference of the tube, and a thermosetting resin present external to the tube. The thermosetting resin has an elastic modulus from 0.5 to 10 MPa, and the continuous carbon fibers and/or continuous glass fibers are impregnated with at least a part of the thermosetting resin. The elastic modulus of the thermosetting resin is a numeric value determined by: heating the thermosetting resin for 2 hours at a curing temperature of the thermosetting resin; then subjecting the thermosetting resin to thermoregulation for two weeks under a condition of a temperature of 23° C. and a relative humidity of 55%; and then performing a measurement in accordance with JIS K7161:2019.

A composite preform including a preform and a plastic member in close contact with the outer surface of the preform is made by preparing the preform made of plastic material and arranging the plastic member to surround the outer surface of the preform. Subsequently, the composite preform is heated and inserted in a blow molding die and undergoes blow molding in the blow molding die, by which the preform and the plastic member of the composite preform are inflated integrally and a composite container is obtained.

A long decorative material with an embossing in register with a pattern, a rolling method and a device therefor are described herein. The method comprises a feeding step of feeding a layered raw material of a long decorative material to be rolled into oppositely rolling rollers; and a rolling step of hot rolling an embossing on the transparent plastic layer. A feeding tension of a printed plastic layer is adjusted according to a longitudinal deviation between the embossing and the pattern in the rolling step. The device comprises a first feeding device, a second feeding device, the oppositely rolling rollers, a detecting device, and a tension controller disposed on the second feeding device. According to the long decorative material with the embossing in register with the pattern manufactured by the method, the embossing hot-rolled on the transparent plastic layer is in register with the pattern on the printed plastic layer. The method, device and the long decorative material with the embossing in register with the pattern processed thereby can implement the embossing on the transparent plastic layer in register with the pattern on the printed plastic layer and have high production efficiency, low cost and less energy consumption.

A compound type polyurethane toilet seat, comprising a surface coating layer, a positioning structure and a seat support; the surface coating layer is made from polyurethane and seamlessly covers the outer surface of the seat support by means of the positioning structure; the preparation process comprises: step 1, spraying a release agent and an in-mold paint in a cavity of a mold; step 2, cleaning the surface of the seat support; step 3, polishing or abrasive blasting; step 4, thermally treating the seat support; step 5, spraying the release agent in the cavity of the mold, and installing the seat support in the cavity of the mold; step 6, injecting a polyurethane raw material into the cavity of the mold, and shaking the mold; step 7, foaming the polyurethane raw material.