JPH0438924Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) The present invention is a pallet for core setting that is used to preset water jacket cores and boat cores used in cylinder head casting of internal combustion engines before setting them in a mold. It is related to the device.

(Prior art) Cores are used to form water jackets and intake/exhaust ports when casting cylinder heads for internal combustion engines, and the cores are placed on a jig stand before being set in a mold. Conventionally, a core is preset and then the core is placed in a mold.

This type of core presetting device was developed in 1982.
No. 132742 was previously proposed by the applicant. This involves fitting and setting the core into a recess on the jig, suctioning and gripping the core using a separately provided suction-type setting device, transporting it into the mold, positioning it, and setting it.

(Problems to be Solved by the Invention) The above-mentioned conventional technology sets each of the water jacket core and port core in a setting jig, then grips the preset core group with a suction setting device, and then Since the process of transporting the core to the mold is required, the process becomes two stages, which increases the working time, and there is a risk that the cores may become misaligned or fall off when transferred from the jig to the setting device. There are other problems.

The present invention was developed to solve the above-mentioned problems, and its purpose is to make it possible to transfer and set the preset core directly into the mold, thereby improving work efficiency. In addition, it is possible to maintain the positional accuracy of the core with high accuracy when setting it in the mold, and it is possible to prevent misalignment when setting the core and core cracking caused by this, as well as to prevent the core from being placed in the mold. To provide a pallet device for setting cores in which presetting means can be easily removed after setting the cores.

(Means for solving the problem) A means for solving the above problem is to connect the bases of the plurality of port bodies together with a baseboard part extending in the direction in which the cylinders are arranged side by side, and to A pallet device for setting a core comprising a pallet for presetting a port core and a water jacket core which are divided into two parts and each integrally formed, the pallet having a tip portion of the port core located approximately at the center of the pallet. A fixing device for the base of the port core or a baseboard portion is provided on both sides of the fixing device, a fixing device for the water jacket core and a positioning pin are provided on the inside, and a fixing device for the port core is provided on the outside. A receiver for receiving the baseboard portion of the port is provided so as to be elastically supported, and each of the cores is placed on a pallet to elastically hold the port core.

(Effects of the above means) According to the above means, the port core and the water jacket core are placed on the pallet, and the fixing tool,
Since it is fitted and placed on the positioning engagement part and supported elastically, setting and positioning on the pallet can be done easily and accurately, and the pallet can be transferred to the die, and there is no possibility of the core falling out. Furthermore, the pallet can be easily and smoothly removed when it is set in the mold.

(Embodiment) Next, a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a perspective view of a pallet device for setting cores according to the present invention, and FIG. 4 shows port cores to be preset into the pallet device.

The port core consists of A for intake and B for exhaust.
In this embodiment, a 4-cylinder intake/exhaust 2-valve type engine is shown. The suction port core A is connected to four port bodies A3... consisting of bifurcated small-diameter port parts A1, A1 and a large-diameter merging part A2, and the base of the main bodies A3..., and connects each port body A3... It consists of a baseboard part A4 extending in the direction in which the cylinders are arranged side by side and connected together, and these baseboard part A4, main body A3, . . . are integrally molded. Positioning recesses A5, A5 are provided at both ends of the baseboard portion A4 and open outward and downward from the end surface.

The exhaust port core B has bifurcated port portions B1 and B.
1. Four port bodies B3 consisting of merging part B2
..., a baseboard part B4 connecting these parts, and positioning recesses B5, B5 formed at both ends thereof.

The water jacket core C is as shown in FIGS. 2 and 7, and is provided with a space C1 in which the port cores fit together, a positioning hole C2 on both sides of one side of the lower surface, and a positioning protrusion C3 on both end surfaces. , C3.

The core setting pallet device for presetting the cores A, B, and C described above is as shown in FIGS. 1, 2, and 3, and there are two Fixtures 3, 3 for the port cores A, B are set up, and trapezoidal slopes 3a, 3a are formed on the upper surfaces of the fixtures 3, 3 for the port cores A, B facing each other as shown in the second figure. Concave portions 4, 4 are provided to fit and support projecting baseboard portions A6, B6 formed at the tips of port bodies A3, A3. Fixing devices 5 and 6 are installed on both sides of the fixing devices 3 and 3, respectively, and port cores A and B
The lower surfaces of the bases of the main bodies A3, B3 and the tips of the baseboard portions A4, B4 are supported by their upper surfaces. Water jacket core fixing devices 7 and 8 are installed inside the fixing devices 5 and 6, and a pin 9 is provided protruding from one of the fixing devices 8.
This is fitted into the positioning hole C2 of the core C from above for positioning, and the upper surface of the other fixture 7 supports the lower surface of the other part of the core C, and the port cores A and B are connected to the water jacket. It fits into the space C1 of the core C.

The left and right sides 1a, 1 of the above set palette 1
A bracket 10 is attached to the part spaced apart in the front and back direction of a.
A rod 11 is fitted into each bracket 10 so as to be slidable in the vertical direction, and the upper end of each rod 11 supports the rear lower surface of baseboard portions A4 and B4 of port cores A and B. Fix the receiver 12, and
A coil spring 13 is installed in the rod between the rod 11 and the bracket 10, and a stopper 11a is provided on the downwardly projecting portion of the rod 11 to prevent the bracket 10 from being fixed.
2 is elastically supported to maintain a predetermined height level. Each port core A,
It elastically supports the lower surfaces of baseboard portions A4 and B4 of B, which are spaced apart in the length direction. In this way, the cores C, A, and B are positioned and supported on the set plate 1,
Also, the port core is elastically supported.

Arms 21 are mounted on both sides of the above set plate 1.
Positioning holes 1a, 1a are provided to the.

Figure 2 shows cores A, B, and C on set palette 1.
It is a diagram in which the cores are placed and supported by recessed fitting through fixtures 3, 5, 6, 7, and 8, and the cores A,
B and C will be positioned and supported on the pallet 1.

The above set pallet 1 is set on the arm 21, and the upper and lower molds 1 are opened as shown in FIG.
The mold surface of the upper mold 14 is provided with slide cores 16, 16 forming a part of the mold, and the core 1
6 and 16 have recesses 16a and 16a that fit into baseboard portions A4 and B4 of port cores A and B, respectively.
The cores 16, 16 are connected to the rods 17a of the cylinders 17, 17, and are moved forward and backward. The arm 21 rises at the set position between the upper and lower molds 14 and 15, and the pin 18 is fitted into the positioning hole 19 of the upper mold to position the arm 21 and therefore the pallet 1. In this state, the slide cores 16 and 16 advance. As the cores 16, 16 move forward, their lower parts abut against the rear part of the receiver 12, and the lower half front part 16b of the cores
By making the core 16 tapered, the core 16 faces onto the receiver 12 and moves it downward against the spring 13, and as a result, the receiver 12 is separated from the baseboard portions A4 and B4. This is shown in Figure 6. core 16,1
6 further advances, the recesses 16a, 16a of these fit into the baseboard portions A4, B4 of the port cores A, B, and hold them, as shown by the chain lines in FIG. 6 and FIG. 7. . On the other hand, slide cores 20, 20 that move forward and backward in a direction perpendicular to the slide cores 16, 16 are provided in the upper mold 14 as shown in FIG. 20c
and pins 20a and 20a are connected to port cores A and B.
Positioning is performed by fitting the protrusions C3 and C3 at both ends of the water jacket core C into the recesses A5 and B5 formed in the baseboard parts A4 and B4 of the water jacket core C.
c, 20c.

As described above, slide cores 16, 16, 20, 2
After positioning and holding the cores A, B, and C at 0, the arm 21 is lowered, whereby the pallet 1 is lowered and the cores A, B, and C are separated from the pallet, and the cores are held in the upper mold. Subsequently, the arm 21 is moved back and removed from between the molds, and the upper mold is lowered and matched with the lower mold, and the core is set in the cavity formed between the upper and lower molds.

(Effects of the invention) As detailed above, according to the invention, the port core and water jacket core, which are integrated on the intake and exhaust sides, are placed on a pallet, and are positioned and supported by fixtures. , and because the baseboard part of the port core is elastically supported by a receiver, there are two cores for each port on the intake and exhaust sides, and one core for the water jacket.
There are 3 pieces in total, and all you have to do is place them from above, fit them into the recesses and pins on the fixture, and then place the baseboard on the elastic support, so positioning and setting of the pallet cores is easy. can be done easily and accurately. Since the core is placed on the pallet as described above, the pallet can be transferred between the molds via the arm, thus eliminating the need for the two-step process of gripping and transferring the material set on the jig. In combination with the elastic support, it is possible to prevent the core from falling off or shifting its position during transfer, and the assembly of these cores can be accurately transferred to the set position of the mold, and the receiving tool is used until it is set in the upper mold, etc. The core can be elastically supported accurately, and the pallet can be removed after being set by simply lowering it without causing any misalignment or damage to the core.The core setting work can also be easily automated by robots, etc. There are advantages.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, and FIG. 1 is a perspective view of a pallet for setting cores, FIG. The figure is a plan view of the same, Figure 4 is a perspective view of the port core, Figure 5 is a side view of the positioning state of transfer to the mold, Figure 6 is an enlarged view of the same main part, and Figure 7 is the top of the core. FIG. 3 is an explanatory plan view showing setting into a mold. In the drawing, 1 is a pallet, 3, 5, 6, 7, 8
is a fixture, 12 is a receiver, 13 is an elastic means, A,
B is a port core, and C is a water jacket core.

Claims (1)

[Scope of utility model registration request] To preset port cores and water jacket cores that are integrally formed by connecting the bases of a plurality of port bodies with a baseboard extending in the direction in which the cylinders are arranged side by side, and are divided into intake and exhaust sides respectively. A pallet device for setting cores consisting of a pallet, in which a fixing device for the tip of the port core is provided approximately in the center of the pallet, and fixing devices for the tip of the port core are provided on both sides of the fixing device for the tip of the port core. A fixing device is provided, and a fixing device and a positioning pin for the water jacket core are provided on the inside thereof, and a receiving device for receiving the skirting portion of the port core is provided on the outside so as to be elastically supported. A pallet device for setting cores, characterized in that a port core is elastically held by placing the port core on the pallet.